jquery.tablesorter.js

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					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 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) {
						
						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++) { 	
										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]);
								}
							};
							
							// trigger sortstart
							$this.trigger("sortStart");
							
							//set css for headers
							setHeadersCss($this[0],$headers,config.sortList,sortCSS);
							
							// javascript threading..
							setTimeout(function() {
								// sort the table and append it to the dom
								appendToTable($this[0],multisort($this[0],config.sortList,cache));
								// trigger sortstart
								$this.trigger("sortEnd");
							}, 0);
							// 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) {
					
						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);
						
						// 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($.meta && ($(this).data() && $(this).data().sortlist)) {
						config.sortList = $(this).data().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.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: "integer",
		is: function(s) {
			return /^\d+$/.test(s);
		},
		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: "floating",
		is: function(s) {
			return s.match(new RegExp(/^(\+|-)?[0-9]+\.[0-9]+((E|e)(\+|-)?[0-9]+)?$/));
		},
		format: function(s) {
			return $.tablesorter.formatFloat(s.replace(new RegExp(/,/),""));
		},
		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 /^\d{1,3}%$/.test(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)))$/));
		},
		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).data()[p];
	    },
	  type: "numeric"
	});
	
	// add default widgets
	ts.addWidget({
		id: "zebra",
		format: function(table) {
			if(table.config.debug) { var time = new Date(); }
			$("tr:visible",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);