/*
 * 
 * TableSorter 2.0 - Client-side table sorting with ease!
 * Version 2.0.3
 * @requires jQuery v1.2.3
 * 
 * Copyright (c) 2007 Christian Bach
 * Examples and docs at: http://tablesorter.com
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * 
 */
/**
 *
 * @description Create a sortable table with multi-column sorting capabilitys
 * 
 * @example $('table').tablesorter();
 * @desc Create a simple tablesorter interface.
 *
 * @example $('table').tablesorter({ sortList:[[0,0],[1,0]] });
 * @desc Create a tablesorter interface and sort on the first and secound column in ascending order.
 * 
 * @example $('table').tablesorter({ headers: { 0: { sorter: false}, 1: {sorter: false} } });
 * @desc Create a tablesorter interface and disableing the first and secound column headers.
 * 
 * @example $('table').tablesorter({ 0: {sorter:"integer"}, 1: {sorter:"currency"} });
 * @desc Create a tablesorter interface and set a column parser for the first and secound column.
 * 
 * 
 * @param Object settings An object literal containing key/value pairs to provide optional settings.
 * 
 * @option String cssHeader (optional)                      A string of the class name to be appended to sortable tr elements in the thead of the table. 
 *                                                                                     Default value: "header"
 * 
 * @option String cssAsc (optional)                      A string of the class name to be appended to sortable tr elements in the thead on a ascending sort. 
 *                                                                                     Default value: "headerSortUp"
 * 
 * @option String cssDesc (optional)                      A string of the class name to be appended to sortable tr elements in the thead on a descending sort. 
 *                                                                                     Default value: "headerSortDown"
 * 
 * @option String sortInitialOrder (optional)        A string of the inital sorting order can be asc or desc. 
 *                                                                                     Default value: "asc"
 * 
 * @option String sortMultisortKey (optional)        A string of the multi-column sort key. 
 *                                                                                     Default value: "shiftKey"
 * 
 * @option String textExtraction (optional)        A string of the text-extraction method to use. 
 *                                                                                     For complex html structures inside td cell set this option to "complex", 
 *                                                                                     on large tables the complex option can be slow. 
 *                                                                                     Default value: "simple"
 * 
 * @option Object headers (optional)                      An array containing the forces sorting rules. 
 *                                                                                     This option let's you specify a default sorting rule. 
 *                                                                                     Default value: null
 * 
 * @option Array sortList (optional)                      An array containing the forces sorting rules. 
 *                                                                                     This option let's you specify a default sorting rule. 
 *                                                                                     Default value: null
 * 
 * @option Array sortForce (optional)                      An array containing forced sorting rules. 
 *                                                                                     This option let's you specify a default sorting rule, which is prepended to user-selected rules.
 *                                                                                     Default value: null
 *  
  * @option Array sortAppend (optional)                      An array containing forced sorting rules. 
 *                                                                                     This option let's you specify a default sorting rule, which is appended to user-selected rules.
 *                                                                                     Default value: null
 * 
 * @option Boolean widthFixed (optional)               Boolean flag indicating if tablesorter should apply fixed widths to the table columns.
 *                                                                                     This is usefull when using the pager companion plugin.
 *                                                                                     This options requires the dimension jquery plugin.
 *                                                                                     Default value: false
 *
 * @option Boolean cancelSelection (optional)        Boolean flag indicating if tablesorter should cancel selection of the table headers text.
 *                                                                                     Default value: true
 *
 * @option Boolean debug (optional)                      Boolean flag indicating if tablesorter should display debuging information usefull for development.
 *
 * @type jQuery
 *
 * @name tablesorter
 * 
 * @cat Plugins/Tablesorter
 * 
 * @author Christian Bach/christian.bach@polyester.se
 */

(function($) {
       $.extend({
              tablesorter: new function() {
                     
                     var parsers = [], widgets = [];
                     
                     this.defaults = {
                            cssHeader: "header",
                            cssAsc: "headerSortUp",
                            cssDesc: "headerSortDown",
                            sortInitialOrder: "asc",
                            sortMultiSortKey: "shiftKey",
                            sortForce: null,
                            sortAppend: null,
                            textExtraction: "simple",
                            parsers: {}, 
                            widgets: [],              
                            widgetZebra: {css: ["even","odd"]},
                            headers: {},
                            widthFixed: false,
                            cancelSelection: true,
                            sortList: [],
                            headerList: [],
                            dateFormat: "us",
                            decimal: '.',
                            debug: false,
                            rpp: 3
                     };
                     
                     /* debuging utils */
                     function benchmark(s,d) {
                            log(s + "," + (new Date().getTime() - d.getTime()) + "ms");
                     }
                     
                     this.benchmark = benchmark;
                     
                     function log(s) {
                            if (typeof console != "undefined" && typeof console.debug != "undefined") {
                                   console.log(s);
                            } else {
                                   alert(s);
                            }
                     }
                                          
                     /* parsers utils */
                     function buildParserCache(table,$headers) {
                            
                            if(table.config.debug) { var parsersDebug = ""; }
                            
                            var rows = table.tBodies[0].rows;
                            
                            if(table.tBodies[0].rows[0]) {

                                   var list = [], cells = rows[0].cells, l = cells.length;
                                   
                                   for (var i=0;i < l; i++) {
                                          var p = false;
                                          
                                          if($.metadata && ($($headers[i]).metadata() && $($headers[i]).metadata().sorter)  ) {
                                          
                                                 p = getParserById($($headers[i]).metadata().sorter);       
                                          
                                          } else if((table.config.headers[i] && table.config.headers[i].sorter)) {
       
                                                 p = getParserById(table.config.headers[i].sorter);
                                          }
                                          if(!p) {
                                                 p = detectParserForColumn(table,cells[i]);
                                          }
       
                                          if(table.config.debug) { parsersDebug += "column:" + i + " parser:" +p.id + "\n"; }
       
                                          list.push(p);
                                   }
                            }
                            
                            if(table.config.debug) { log(parsersDebug); }

                            return list;
                     };
                     
                     function detectParserForColumn(table,node) {
                     
                            var l = parsers.length;
                            for(var i=1; i < l; i++) {
                                   if(parsers[i].is($.trim(getElementText(table.config,node)),table,node)) {
                                          return parsers[i];
                                   }
                            }
                            
                            // 0 is always the generic parser (text)
                            return parsers[0];
                     }
                     
                     function getParserById(name) {
                            var l = parsers.length;
                            for(var i=0; i < l; i++) {
                                   if(parsers[i].id.toLowerCase() == name.toLowerCase()) {       
                                          return parsers[i];
                                   }
                            }
                            return false;
                     }
                     
                     /* utils */
                     function buildCache(table) {
                            
                            if(table.config.debug) { var cacheTime = new Date(); }
                            
                            
                            var totalRows = (table.tBodies[0] && table.tBodies[0].rows.length) || 0,
                                   totalCells = (table.tBodies[0].rows[0] && table.tBodies[0].rows[0].cells.length) || 0,
                                   parsers = table.config.parsers, 
                                   cache = {row: [], normalized: []};
                            
                                   for (var i=0;i < totalRows; ++i) {
                                   
                                          /** Add the table data to main data array */
                                          var c = table.tBodies[0].rows[i], cols = [];
                                   
                                          cache.row.push($(c));
                                          
                                          for(var j=0; j < totalCells; ++j) {
                                                 cols.push(parsers[j].format(getElementText(table.config,c.cells[j]),table,c.cells[j]));       
                                          }
                                                                                    
                                          cols.push(i); // add position for rowCache
                                          cache.normalized.push(cols);
                                          cols = null;
                                   };
                            
                            if(table.config.debug) { benchmark("Building cache for " + totalRows + " rows:", cacheTime); }
                            
                            return cache;
                     };
                     
                     function getElementText(config,node) {
                            
                            if(!node) return "";
                                                        
                            var t = "";
                            
                            if(config.textExtraction == "simple") {
                                   if(node.childNodes[0] && node.childNodes[0].hasChildNodes()) {
                                          t = node.childNodes[0].innerHTML;
                                   } else {
                                          t = node.innerHTML;
                                   }
                            } else {
                                   if(typeof(config.textExtraction) == "function") {
                                          t = config.textExtraction(node);
                                   } else { 
                                          t = $(node).text();
                                   }       
                            }
                            return t;
                     }
                     
                     function appendToTable(table,cache) {
                            
                            if(table.config.debug) {var appendTime = new Date()}
                            
                            var c = cache, 
                                   r = c.row, 
                                   n= c.normalized, 
                                   totalRows = n.length, 
                                   checkCell = (n[0].length-1), 
                                   tableBody = $(table.tBodies[0]),
                                   rows = [];
                            
                            for (var i=0;i < totalRows; i++) {
                                   rows.push(r[n[i][checkCell]]);       
                                   if(!table.config.appender) {
                                          
                                          var o = r[n[i][checkCell]];
                                          var l = o.length;
                                          for(var j=0; j < l; j++) {
                                                 
                                                 tableBody[0].appendChild(o[j]);
                                          
                                          }
                                          
                                          //tableBody.append(r[n[i][checkCell]]);
                                   }
                            }       
                            
                            if(table.config.appender) {
                            
                                   table.config.appender(table,rows);       
                            }
                            
                            rows = null;
                            
                            if(table.config.debug) { benchmark("Rebuilt table:", appendTime); }
                                                        
                            //apply table widgets
                            applyWidget(table);
                            
                            // trigger sortend
                            setTimeout(function() {
                                   $(table).trigger("sortEnd");       
                            },0);
                            
                     };
                     
                     function buildHeaders(table) {
                            
                            if(table.config.debug) { var time = new Date(); }
                            
                            var meta = ($.metadata) ? true : false, tableHeadersRows = [];
                     
                            for(var i = 0; i < table.tHead.rows.length; i++) { tableHeadersRows[i]=0; };
                            
                            $tableHeaders = $("thead th",table);
              
                            $tableHeaders.each(function(index) {
                                                 
                                   this.count = 0;
                                   this.column = index;
                                   this.order = formatSortingOrder(table.config.sortInitialOrder);
                                   
                                   if(checkHeaderMetadata(this) || checkHeaderOptions(table,index) || $(this).hasClass('nosort')) 
                                          this.sortDisabled = true;
                                   
                                   if(!this.sortDisabled) {
                                          $(this).addClass(table.config.cssHeader);
                                          //$(this).find('span').css('background-image', 'url(../img/asc.gif)')
                                   }
                                   
                                   // add cell to headerList
                                   table.config.headerList[index] = this;
                            });
                            
                            if(table.config.debug) { benchmark("Built headers:", time); log($tableHeaders); }
                            
                            return $tableHeaders;
                            
                     };
                                          
                        function checkCellColSpan(table, rows, row) {
                var arr = [], r = table.tHead.rows, c = r[row].cells;
                            
                            for(var i=0; i < c.length; i++) {
                                   var cell = c[i];
                                   
                                   if ( cell.colSpan > 1) { 
                                          arr = arr.concat(checkCellColSpan(table, headerArr,row++));
                                   } else  {
                                          if(table.tHead.length == 1 || (cell.rowSpan > 1 || !r[row+1])) {
                                                 arr.push(cell);
                                          }
                                          //headerArr[row] = (i+row);
                                   }
                            }
                            return arr;
                     };
                     
                     function checkHeaderMetadata(cell) {
                            if(($.metadata) && ($(cell).metadata().sorter === false)) { return true; };
                            return false;
                     }
                     
                     function checkHeaderOptions(table,i) {       
                            if((table.config.headers[i]) && (table.config.headers[i].sorter === false)) { return true; };
                            return false;
                     }
                     
                     function applyWidget(table) {
                            var c = table.config.widgets;
                            var l = c.length;
                            for(var i=0; i < l; i++) {
                                   
                                   getWidgetById(c[i]).format(table);
                            }
                            
                     }
                     
                     function getWidgetById(name) {
                            var l = widgets.length;
                            for(var i=0; i < l; i++) {
                                   if(widgets[i].id.toLowerCase() == name.toLowerCase() ) {
                                          return widgets[i]; 
                                   }
                            }
                     };
                     
                     function formatSortingOrder(v) {
                            
                            if(typeof(v) != "Number") {
                                   i = (v.toLowerCase() == "desc") ? 1 : 0;
                            } else {
                                   i = (v == (0 || 1)) ? v : 0;
                            }
                            return i;
                     }
                     
                     function isValueInArray(v, a) {
                            var l = a.length;
                            for(var i=0; i < l; i++) {
                                   if(a[i][0] == v) {
                                          return true;       
                                   }
                            }
                            return false;
                     }
                     
                     function makeVisible( table, config ) {
                            var lp = 0;
                            $(table).find('tr:visible').each(function(){
                                   $(this).find('td:eq(0)').text(lp);
                                   lp++;
                            });
                     }
                            
                     function setHeadersCss(table,$headers, list, css, config) {
                            // remove all header information
                            $headers.removeClass(css[0]).removeClass(css[1]);
                            
                            var h = [];
                            $headers.each(function(offset) {
                                          if(!this.sortDisabled) {
                                                 h[this.column] = $(this);                                   
                                          }
                            });
                            
                            var l = list.length; 
                            for(var i=0; i < l; i++) {
                                   h[list[i][0]].addClass(css[list[i][1]]);
                            }
                     }
                     
                     function fixColumnWidth(table,$headers) {
                            var c = table.config;
                            if(c.widthFixed) {
                                   var colgroup = $('<colgroup>');
                                   $("tr:first td",table.tBodies[0]).each(function() {
                                          colgroup.append($('<col>').css('width',$(this).width()));
                                   });
                                   $(table).prepend(colgroup);
                            };
                     }
                     
                     function updateHeaderSortCount(table,sortList) {
                            var c = table.config, l = sortList.length;
                            for(var i=0; i < l; i++) {
                                   var s = sortList[i], o = c.headerList[s[0]];
                                   o.count = s[1];
                                   o.count++;
                            }
                     }
                     
                     /* sorting methods */
                     function multisort(table,sortList,cache) {
                            
                            if(table.config.debug) { var sortTime = new Date(); }
                            
                            var dynamicExp = "var sortWrapper = function(a,b) {", l = sortList.length;
                                   
                            for(var i=0; i < l; i++) {
                                   
                                   var c = sortList[i][0];
                                   var order = sortList[i][1];
                                   var s = (getCachedSortType(table.config.parsers,c) == "text") ? ((order == 0) ? "sortText" : "sortTextDesc") : ((order == 0) ? "sortNumeric" : "sortNumericDesc");
                                   
                                   var e = "e" + i;
                                   
                                   dynamicExp += "var " + e + " = " + s + "(a[" + c + "],b[" + c + "]); ";
                                   dynamicExp += "if(" + e + ") { return " + e + "; } ";
                                   dynamicExp += "else { ";
                            }
                            
                            // if value is the same keep orignal order       
                            var orgOrderCol = cache.normalized[0].length - 1;
                            dynamicExp += "return a[" + orgOrderCol + "]-b[" + orgOrderCol + "];";
                                          
                            for(var i=0; i < l; i++) {
                                   dynamicExp += "}; ";
                            }
                            
                            dynamicExp += "return 0; ";       
                            dynamicExp += "}; ";       
                            
                            eval(dynamicExp);
                            
                            cache.normalized.sort(sortWrapper);
                            
                            if(table.config.debug) { benchmark("Sorting on " + sortList.toString() + " and dir " + order+ " time:", sortTime); }
                            
                            return cache;
                     };
                     
                     function sortText(a,b) {
                            return ((a < b) ? -1 : ((a > b) ? 1 : 0));
                     };
                     
                     function sortTextDesc(a,b) {
                            return ((b < a) ? -1 : ((b > a) ? 1 : 0));
                     };       
                     
                      function sortNumeric(a,b) {
                            return a-b;
                     };
                     
                     function sortNumericDesc(a,b) {
                            return b-a;
                     };
                     
                     function sortPrice(a,b) {
                            return a-b;
                     };
                     
                     function sortPriceDesc(a,b) {
                            return b-a;
                     };
                     
                     function getCachedSortType(parsers,i) {
                            return parsers[i].type;
                     };
                     
                     /* public methods */
                     this.construct = function(settings) {

                            return this.each(function() {
                                   
                                   if(!this.tHead || !this.tBodies) return;
                                   
                                   var $this, $document,$headers, cache, config, shiftDown = 0, sortOrder;
                                   
                                   this.config = {};
                                   
                                   config = $.extend(this.config, $.tablesorter.defaults, settings);
                                   
                                   // store common expression for speed                                   
                                   $this = $(this);
                                   
                                   // build headers
                                   $headers = buildHeaders(this);
                                   
                                   // try to auto detect column type, and store in tables config
                                   this.config.parsers = buildParserCache(this,$headers);
                                   
                                   
                                   // build the cache for the tbody cells
                                   cache = buildCache(this);
                                   
                                   // get the css class names, could be done else where.
                                   var sortCSS = [config.cssDesc,config.cssAsc];
                                   
                                   // fixate columns if the users supplies the fixedWidth option
                                   fixColumnWidth(this);
                                   
                                   // apply event handling to headers
                                   // this is to big, perhaps break it out?
                                   $headers.click(function(e) {
                                          
                                          $this.trigger("sortStart");
                                          
                                          var totalRows = ($this[0].tBodies[0] && $this[0].tBodies[0].rows.length) || 0;
                                          
                                          if(!this.sortDisabled && totalRows > 0) {
                                                 
                                                 
                                                 // store exp, for speed
                                                 var $cell = $(this);
       
                                                 // get current column index
                                                 var i = this.column;
                                                 
                                                 // get current column sort order
                                                 this.order = this.count++ % 2;
                                                 
                                                 // user only whants to sort on one column
                                                 if(!e[config.sortMultiSortKey]) {
                                                        
                                                        // flush the sort list
                                                        config.sortList = [];
                                                        
                                                        if(config.sortForce != null) {
                                                               var a = config.sortForce; 
                                                               for(var j=0; j < a.length; j++) {
                                                                      if(a[j][0] != i) {
                                                                             config.sortList.push(a[j]);
                                                                      }
                                                               }
                                                        }
                                                        
                                                        // add column to sort list
                                                        config.sortList.push([i,this.order]);
                                                 
                                                 // multi column sorting
                                                 } else {
                                                        // the user has clicked on an all ready sortet column.
                                                        if(isValueInArray(i,config.sortList)) {        
                                                               
                                                               // revers the sorting direction for all tables.
                                                               for(var j=0; j < config.sortList.length; j++) {
                                                                      var s = config.sortList[j], o = config.headerList[s[0]];
                                                                      if(s[0] == i) {
                                                                             o.count = s[1];
                                                                             o.count++;
                                                                             s[1] = o.count % 2;
                                                                      }
                                                               }       
                                                        } else {
                                                               // add column to sort list array
                                                               config.sortList.push([i,this.order]);
                                                        }
                                                 };
                                                 setTimeout(function() {
                                                        //set css for headers
                                                        setHeadersCss($this[0],$headers,config.sortList,sortCSS, config);
                                                        appendToTable($this[0],multisort($this[0],config.sortList,cache));
                                                        makeVisible($this[0],config);
                                                 },1);
                                                 // stop normal event by returning false
                                                 
                                                 return false;
                                          }
                                   // cancel selection       
                                   }).mousedown(function() {
                                          if(config.cancelSelection) {
                                                 this.onselectstart = function() {return false};
                                                 return false;
                                          }
                                   });
                                   
                                   // apply easy methods that trigger binded events
                                   $this.bind("update",function() {
                                          
                                          // rebuild parsers.
                                          this.config.parsers = buildParserCache(this,$headers);
                                          
                                          // rebuild the cache map
                                          cache = buildCache(this);
                                          
                                   }).bind("sorton",function(e,list) {
                                          
                                          $(this).trigger("sortStart");
                                          
                                          config.sortList = list;
                                          
                                          // update and store the sortlist
                                          var sortList = config.sortList;
                                          
                                          // update header count index
                                          updateHeaderSortCount(this,sortList);
                                          
                                          //set css for headers
                                          setHeadersCss(this,$headers,sortList,sortCSS, config);
                                          
                                          
                                          // sort the table and append it to the dom
                                          appendToTable(this,multisort(this,sortList,cache));

                                   }).bind("appendCache",function() {
                                          
                                          appendToTable(this,cache);
                                   
                                   }).bind("applyWidgetId",function(e,id) {
                                          
                                          getWidgetById(id).format(this);
                                          
                                   }).bind("applyWidgets",function() {
                                          // apply widgets
                                          applyWidget(this);
                                   });
                                   
                                   if($.metadata && ($(this).metadata() && $(this).metadata().sortlist)) {
                                          config.sortList = $(this).metadata().sortlist;
                                   }
                                   // if user has supplied a sort list to constructor.
                                   if(config.sortList.length > 0) {
                                          $this.trigger("sorton",[config.sortList]);       
                                   }
                                   
                                   // apply widgets
                                   applyWidget(this);
                            });
                     };
                     
                     this.addParser = function(parser) {
                            var l = parsers.length, a = true;
                            for(var i=0; i < l; i++) {
                                   if(parsers[i].id.toLowerCase() == parser.id.toLowerCase()) {
                                          a = false;
                                   }
                            }
                            if(a) { parsers.push(parser); };
                     };
                     
                     this.addWidget = function(widget) {
                            widgets.push(widget);
                     };
                     
                     this.formatFloat = function(s) {
                            var i = parseFloat(s);
                            return (isNaN(i)) ? 0 : i;
                     };
                     this.formatInt = function(s) {
                            var i = parseInt(s);
                            return (isNaN(i)) ? 0 : i;
                     };
                     
                     this.isDigit = function(s,config) {
                            var DECIMAL = '\\' + config.decimal;
                            var exp = '/(^[+]?0(' + DECIMAL +'0+)?$)|(^([-+]?[1-9][0-9]*)$)|(^([-+]?((0?|[1-9][0-9]*)' + DECIMAL +'(0*[1-9][0-9]*)))$)|(^[-+]?[1-9]+[0-9]*' + DECIMAL +'0+$)/';
                            return RegExp(exp).test($.trim(s));
                     };
                     
                     this.clearTableBody = function(table) {
                            if($.browser.msie) {
                                   function empty() {
                                          while ( this.firstChild ) this.removeChild( this.firstChild );
                                   }
                                   empty.apply(table.tBodies[0]);
                            } else {
                                   table.tBodies[0].innerHTML = "";
                            }
                     };
              }
       });
       
       // extend plugin scope
       $.fn.extend({
        tablesorter: $.tablesorter.construct
       });
       
       var ts = $.tablesorter;
       
       // add default parsers
       ts.addParser({
              id: "text",
              is: function(s) {
                     return true;
              },
              format: function(s) {
                     return $.trim(s.toLowerCase());
              },
              type: "text"
       });
       
       ts.addParser({
              id: "digit",
              is: function(s,table) {
                     var c = table.config;
                     return $.tablesorter.isDigit(s,c);
              },
              format: function(s) {
                     return $.tablesorter.formatFloat(s);
              },
              type: "numeric"
       });
       
       ts.addParser({
              id: "currency",
              is: function(s) {
                     return /^[£$€?.]/.test(s);
              },
              format: function(s) {
                     return $.tablesorter.formatFloat(s.replace(new RegExp(/[^0-9.]/g),""));
              },
              type: "numeric"
       });
       
       ts.addParser({
              id: "ipAddress",
              is: function(s) {
                     return /^\d{2,3}[\.]\d{2,3}[\.]\d{2,3}[\.]\d{2,3}$/.test(s);
              },
              format: function(s) {
                     var a = s.split("."), r = "", l = a.length;
                     for(var i = 0; i < l; i++) {
                            var item = a[i];
                               if(item.length == 2) {
                                   r += "0" + item;
                               } else {
                                   r += item;
                               }
                     }
                     return $.tablesorter.formatFloat(r);
              },
              type: "numeric"
       });
       
       ts.addParser({
              id: "url",
              is: function(s) {
                     return /^(https?|ftp|file):\/\/$/.test(s);
              },
              format: function(s) {
                     return jQuery.trim(s.replace(new RegExp(/(https?|ftp|file):\/\//),''));
              },
              type: "text"
       });
       
       ts.addParser({
              id: "isoDate",
              is: function(s) {
                     return /^\d{4}[\/-]\d{1,2}[\/-]\d{1,2}$/.test(s);
              },
              format: function(s) {
                     return $.tablesorter.formatFloat((s != "") ? new Date(s.replace(new RegExp(/-/g),"/")).getTime() : "0");
              },
              type: "numeric"
       });
              
       ts.addParser({
              id: "percent",
              is: function(s) { 
                     return /\%$/.test($.trim(s));
              },
              format: function(s) {
                     return $.tablesorter.formatFloat(s.replace(new RegExp(/%/g),""));
              },
              type: "numeric"
       });

       ts.addParser({
              id: "usLongDate",
              is: function(s) {
//                     return s.match(new RegExp(/^[A-Za-z]{3,10}\.? [0-9]{1,2}, ([0-9]{4}|'?[0-9]{2}) (([0-2]?[0-9]:[0-5][0-9])|([0-1]?[0-9]:[0-5][0-9]\s(AM|PM)))$/));
                     return s.match(new RegExp(/^[A-Za-z]{3,10}\.? [0-9]{1,2}, ([0-9]{4}|'?[0-9]{2}) (([0-2]?[0-9]:[0-5][0-9])|([0-1]?[0-9]:[0-5][0-9]\s(AM|PM)))$/));
              },
              format: function(s) {
                     return $.tablesorter.formatFloat(new Date(s).getTime());
              },
              type: "numeric"
       });

       ts.addParser({
              id: "shortDate",
              is: function(s) {
                     return /\d{1,2}[\/\-]\d{1,2}[\/\-]\d{2,4}/.test(s);
              },
              format: function(s,table) {
                     var c = table.config;
                     s = s.replace(/\-/g,"/");
                     if(c.dateFormat == "us") {
                            // reformat the string in ISO format
                            s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{4})/, "$3/$1/$2");
                     } else if(c.dateFormat == "uk") {
                            //reformat the string in ISO format
                            s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{4})/, "$3/$2/$1");
                     } else if(c.dateFormat == "dd/mm/yy" || c.dateFormat == "dd-mm-yy") {
                            s = s.replace(/(\d{1,2})[\/\-](\d{1,2})[\/\-](\d{2})/, "$1/$2/$3");       
                     }
                     return $.tablesorter.formatFloat(new Date(s).getTime());
              },
              type: "numeric"
       });

       ts.addParser({
           id: "time",
           is: function(s) {
               return /^(([0-2]?[0-9]:[0-5][0-9])|([0-1]?[0-9]:[0-5][0-9]\s(am|pm)))$/.test(s);
           },
           format: function(s) {
               return $.tablesorter.formatFloat(new Date("2000/01/01 " + s).getTime());
           },
         type: "numeric"
       });
       
       
       ts.addParser({
           id: "metadata",
           is: function(s) {
               return false;
           },
           format: function(s,table,cell) {
                     var c = table.config, p = (!c.parserMetadataName) ? 'sortValue' : c.parserMetadataName;
               return $(cell).metadata()[p];
           },
         type: "numeric"
       });
       
       // add default widgets
       ts.addWidget({
              id: "zebra",
              format: function(table) {
                     if(table.config.debug) { var time = new Date(); }
                     $("tr",table.tBodies[0])
               .filter(':even')
               .removeClass(table.config.widgetZebra.css[1]).addClass(table.config.widgetZebra.css[0])
               .end().filter(':odd')
               .removeClass(table.config.widgetZebra.css[0]).addClass(table.config.widgetZebra.css[1]);
                     if(table.config.debug) { $.tablesorter.benchmark("Applying Zebra widget", time); }
              }
       });       
})(jQuery);