/*
 SortTable
 http://www.kryogenix.org/code/browser/sorttable/
*/

 
var stIsIE = /*@cc_on!@*/false;

sorttable = {
 init: function() {
 // quit if this function has already been called
 if (arguments.callee.done) return;
 // flag this function so we don't do the same thing twice
 arguments.callee.done = true;
 // kill the timer
 if (_timer) clearInterval(_timer);
 
 if (!document.createElement || !document.getElementsByTagName) return;
 
 sorttable.DATE_RE = /^(\d\d?)[\/\.-](\d\d?)[\/\.-]((\d\d)?\d\d)$/;
 
 forEach(document.getElementsByTagName('table'), function(table) {
 if (table.className.search(/\bsortable\b/) != -1) {
 sorttable.makeSortable(table);
 }
 });
 
 },
 
 makeSortable: function(table) {
 if (table.getElementsByTagName('thead').length == 0) {
 // table doesn't have a tHead. Since it should have, create one and
 // put the first table row in it.
 the = document.createElement('thead');
 the.appendChild(table.rows[0]);
 table.insertBefore(the,table.firstChild);
 }
 // Safari doesn't support table.tHead, sigh
 if (table.tHead == null) table.tHead = table.getElementsByTagName('thead')[0];
 
 if (table.tHead.rows.length != 1) return; // can't cope with two header rows
 
 // Sorttable v1 put rows with a class of "sortbottom" at the bottom (as
 // "total" rows, for example). This is B&R, since what you're supposed
 // to do is put them in a tfoot. So, if there are sortbottom rows,
 // for backwards compatibility, move them to tfoot (creating it if needed).
 sortbottomrows = [];
 for (var i=0; i<table.rows.length; i++) {
 if (table.rows[i].className.search(/\bsortbottom\b/) != -1) {
 sortbottomrows[sortbottomrows.length] = table.rows[i];
 }
 }
 if (sortbottomrows) {
 if (table.tFoot == null) {
 // table doesn't have a tfoot. Create one.
 tfo = document.createElement('tfoot');
 table.appendChild(tfo);
 }
 for (var i=0; i<sortbottomrows.length; i++) {
 tfo.appendChild(sortbottomrows[i]);
 }
 delete sortbottomrows;
 }
 
 // work through each column and calculate its type
 headrow = table.tHead.rows[0].cells;
 for (var i=0; i<headrow.length; i++) {
 // manually override the type with a sorttable_type attribute
 if (!headrow[i].className.match(/\bsorttable_nosort\b/)) { // skip this col
 mtch = headrow[i].className.match(/\bsorttable_([a-z0-9]+)\b/);
 if (mtch) { override = mtch[1]; }
	 if (mtch && typeof sorttable["sort_"+override] == 'function') {
	 headrow[i].sorttable_sortfunction = sorttable["sort_"+override];
	 } else {
	 headrow[i].sorttable_sortfunction = sorttable.guessType(table,i);
	 }
	 // make it clickable to sort
	 headrow[i].sorttable_columnindex = i;
	 headrow[i].sorttable_tbody = table.tBodies[0];
	 dean_addEvent(headrow[i],"click", function(e) {

 if (this.className.search(/\bsorttable_sorted\b/) != -1) {
 // if we're already sorted by this column, just 
 // reverse the table, which is quicker
 sorttable.reverse(this.sorttable_tbody);
 this.className = this.className.replace('sorttable_sorted',
 'sorttable_sorted_reverse');
 this.removeChild(document.getElementById('sorttable_sortfwdind'));
 sortrevind = document.createElement('span');
 sortrevind.id = "sorttable_sortrevind";
 sortrevind.innerHTML = stIsIE ? '&nbsp<font face="webdings">5</font>' : '&nbsp;&#x25B4;';
 this.appendChild(sortrevind);
 return;
 }
 if (this.className.search(/\bsorttable_sorted_reverse\b/) != -1) {
 // if we're already sorted by this column in reverse, just 
 // re-reverse the table, which is quicker
 sorttable.reverse(this.sorttable_tbody);
 this.className = this.className.replace('sorttable_sorted_reverse',

 'sorttable_sorted');
 this.removeChild(document.getElementById('sorttable_sortrevind'));
 sortfwdind = document.createElement('span');
 sortfwdind.id = "sorttable_sortfwdind";
 sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
 this.appendChild(sortfwdind);
 return;
 }
 
 // remove sorttable_sorted classes
 theadrow = this.parentNode;
 forEach(theadrow.childNodes, function(cell) {
 if (cell.nodeType == 1) { // an element
 cell.className = cell.className.replace('sorttable_sorted_reverse','');
 cell.className = cell.className.replace('sorttable_sorted','');
 }
 });
 sortfwdind = document.getElementById('sorttable_sortfwdind');
 if (sortfwdind) { sortfwdind.parentNode.removeChild(sortfwdind); }
 sortrevind = document.getElementById('sorttable_sortrevind');
 if (sortrevind) { sortrevind.parentNode.removeChild(sortrevind); }
 
 this.className += ' sorttable_sorted';
 sortfwdind = document.createElement('span');
 sortfwdind.id = "sorttable_sortfwdind";
 sortfwdind.innerHTML = stIsIE ? '&nbsp<font face="webdings">6</font>' : '&nbsp;&#x25BE;';
 this.appendChild(sortfwdind);

	 // build an array to sort. This is a Schwartzian transform thing,
	 // i.e., we "decorate" each row with the actual sort key,
	 // sort based on the sort keys, and then put the rows back in order
	 // which is a lot faster because you only do getInnerText once per row
	 row_array = [];
	 col = this.sorttable_columnindex;
	 rows = this.sorttable_tbody.rows;
	 for (var j=0; j<rows.length; j++) {
	 row_array[row_array.length] = [sorttable.getInnerText(rows[j].cells[col]), rows[j]];
	 }
	 /* If you want a stable sort, uncomment the following line */
	 //sorttable.shaker_sort(row_array, this.sorttable_sortfunction);
	 /* and comment out this one */
	 row_array.sort(this.sorttable_sortfunction);
	 
	 tb = this.sorttable_tbody;
	 for (var j=0; j<row_array.length; j++) {
	 tb.appendChild(row_array[j][1]);
	 }
	 
	 delete row_array;
	 });
	 }
 }
 },
 
 guessType: function(table, column) {
 // guess the type of a column based on its first non-blank row
 sortfn = sorttable.sort_alpha;
 for (var i=0; i<table.tBodies[0].rows.length; i++) {
 text = sorttable.getInnerText(table.tBodies[0].rows[i].cells[column]);
 if (text != '') {
 if (text.match(/^-?[£$¤]?[\d,.]+%?$/)) {
 return sorttable.sort_numeric;
 }
 // check for a date: dd/mm/yyyy or dd/mm/yy 
 // can have / or . or - as separator
 // can be mm/dd as well
 possdate = text.match(sorttable.DATE_RE)
 if (possdate) {
 // looks like a date
 first = parseInt(possdate[1]);
 second = parseInt(possdate[2]);
 if (first > 12) {
 // definitely dd/mm
 return sorttable.sort_ddmm;
 } else if (second > 12) {
 return sorttable.sort_mmdd;
 } else {
 // looks like a date, but we can't tell which, so assume
 // that it's dd/mm (English imperialism!) and keep looking
 sortfn = sorttable.sort_ddmm;
 }
 }
 }
 }
 return sortfn;
 },
 
 getInnerText: function(node) {
 // gets the text we want to use for sorting for a cell.
 // strips leading and trailing whitespace.
 // this is *not* a generic getInnerText function; it's special to sorttable.
 // for example, you can override the cell text with a customkey attribute.
 // it also gets .value for <input> fields.
 
 hasInputs = (typeof node.getElementsByTagName == 'function') &&
 node.getElementsByTagName('input').length;
 
 if (node.getAttribute("sorttable_customkey") != null) {
 return node.getAttribute("sorttable_customkey");
 }
 else if (typeof node.textContent != 'undefined' && !hasInputs) {
 return node.textContent.replace(/^\s+|\s+$/g, '');
 }
 else if (typeof node.innerText != 'undefined' && !hasInputs) {
 return node.innerText.replace(/^\s+|\s+$/g, '');
 }
 else if (typeof node.text != 'undefined' && !hasInputs) {
 return node.text.replace(/^\s+|\s+$/g, '');
 }
 else {
 switch (node.nodeType) {
 case 3:
 if (node.nodeName.toLowerCase() == 'input') {
 return node.value.replace(/^\s+|\s+$/g, '');
 }
 case 4:
 return node.nodeValue.replace(/^\s+|\s+$/g, '');
 break;
 case 1:
 case 11:
 var innerText = '';
 for (var i = 0; i < node.childNodes.length; i++) {
 innerText += sorttable.getInnerText(node.childNodes[i]);
 }
 return innerText.replace(/^\s+|\s+$/g, '');
 break;
 default:
 return '';
 }
 }
 },
 
 reverse: function(tbody) {
 // reverse the rows in a tbody
 newrows = [];
 for (var i=0; i<tbody.rows.length; i++) {
 newrows[newrows.length] = tbody.rows[i];
 }
 for (var i=newrows.length-1; i>=0; i--) {
 tbody.appendChild(newrows[i]);
 }
 delete newrows;
 },
 
 /* sort functions
 each sort function takes two parameters, a and b
 you are comparing a[0] and b[0] */
 sort_numeric: function(a,b) {
 aa = parseFloat(a[0].replace(/[^0-9.-]/g,''));
 if (isNaN(aa)) aa = 0;
 bb = parseFloat(b[0].replace(/[^0-9.-]/g,'')); 
 if (isNaN(bb)) bb = 0;
 return aa-bb;
 },
 sort_alpha: function(a,b) {
 if (a[0]==b[0]) return 0;
 if (a[0]<b[0]) return -1;
 return 1;
 },
 sort_ddmm: function(a,b) {
 mtch = a[0].match(sorttable.DATE_RE);
 y = mtch[3]; m = mtch[2]; d = mtch[1];
 if (m.length == 1) m = '0'+m;
 if (d.length == 1) d = '0'+d;
 dt1 = y+m+d;
 mtch = b[0].match(sorttable.DATE_RE);
 y = mtch[3]; m = mtch[2]; d = mtch[1];
 if (m.length == 1) m = '0'+m;
 if (d.length == 1) d = '0'+d;
 dt2 = y+m+d;
 if (dt1==dt2) return 0;
 if (dt1<dt2) return -1;
 return 1;
 },
 sort_mmdd: function(a,b) {
 mtch = a[0].match(sorttable.DATE_RE);
 y = mtch[3]; d = mtch[2]; m = mtch[1];
 if (m.length == 1) m = '0'+m;
 if (d.length == 1) d = '0'+d;
 dt1 = y+m+d;
 mtch = b[0].match(sorttable.DATE_RE);
 y = mtch[3]; d = mtch[2]; m = mtch[1];
 if (m.length == 1) m = '0'+m;
 if (d.length == 1) d = '0'+d;
 dt2 = y+m+d;
 if (dt1==dt2) return 0;
 if (dt1<dt2) return -1;
 return 1;
 },
 
 shaker_sort: function(list, comp_func) {
 // A stable sort function to allow multi-level sorting of data
 // see: http://en.wikipedia.org/wiki/Cocktail_sort
 // thanks to Joseph Nahmias
 var b = 0;
 var t = list.length - 1;
 var swap = true;

 while(swap) {
 swap = false;
 for(var i = b; i < t; ++i) {
 if ( comp_func(list[i], list[i+1]) > 0 ) {
 var q = list[i]; list[i] = list[i+1]; list[i+1] = q;
 swap = true;
 }
 } // for
 t--;

 if (!swap) break;

 for(var i = t; i > b; --i) {
 if ( comp_func(list[i], list[i-1]) < 0 ) {
 var q = list[i]; list[i] = list[i-1]; list[i-1] = q;
 swap = true;
 }
 } // for
 b++;

 } // while(swap)
 } 
}

/* ******************************************************************
 Supporting functions: bundled here to avoid depending on a library
 ****************************************************************** */

// Dean Edwards/Matthias Miller/John Resig

/* for Mozilla/Opera9 */
if (document.addEventListener) {
 document.addEventListener("DOMContentLoaded", sorttable.init, false);
}

/* for Internet Explorer */
/*@cc_on @*/
/*@if (@_win32)
 document.write("<script id=__ie_onload defer src=javascript:void(0)><\/script>");
 var script = document.getElementById("__ie_onload");
 script.onreadystatechange = function() {
 if (this.readyState == "complete") {
 sorttable.init(); // call the onload handler
 }
 };
/*@end @*/

/* for Safari */
if (/WebKit/i.test(navigator.userAgent)) { // sniff
 var _timer = setInterval(function() {
 if (/loaded|complete/.test(document.readyState)) {
 sorttable.init(); // call the onload handler
 }
 }, 10);
}

/* for other browsers */
window.onload = sorttable.init;

// written by Dean Edwards, 2005
// with input from Tino Zijdel, Matthias Miller, Diego Perini

// http://dean.edwards.name/weblog/2005/10/add-event/

function dean_addEvent(element, type, handler) {
	if (element.addEventListener) {
		element.addEventListener(type, handler, false);
	} else {
		// assign each event handler a unique ID
		if (!handler.$$guid) handler.$$guid = dean_addEvent.guid++;
		// create a hash table of event types for the element
		if (!element.events) element.events = {};
		// create a hash table of event handlers for each element/event pair
		var handlers = element.events[type];
		if (!handlers) {
			handlers = element.events[type] = {};
			// store the existing event handler (if there is one)
			if (element["on" + type]) {
				handlers[0] = element["on" + type];
			}
		}
		// store the event handler in the hash table
		handlers[handler.$$guid] = handler;
		// assign a global event handler to do all the work
		element["on" + type] = handleEvent;
	}
};
// a counter used to create unique IDs
dean_addEvent.guid = 1;

function removeEvent(element, type, handler) {
	if (element.removeEventListener) {
		element.removeEventListener(type, handler, false);
	} else {
		// delete the event handler from the hash table
		if (element.events && element.events[type]) {
			delete element.events[type][handler.$$guid];
		}
	}
};

function handleEvent(event) {
	var returnValue = true;
	// grab the event object (IE uses a global event object)
	event = event || fixEvent(((this.ownerDocument || this.document || this).parentWindow || window).event);
	// get a reference to the hash table of event handlers
	var handlers = this.events[event.type];
	// execute each event handler
	for (var i in handlers) {
		this.$$handleEvent = handlers[i];
		if (this.$$handleEvent(event) === false) {
			returnValue = false;
		}
	}
	return returnValue;
};

function fixEvent(event) {
	// add W3C standard event methods
	event.preventDefault = fixEvent.preventDefault;
	event.stopPropagation = fixEvent.stopPropagation;
	return event;
};
fixEvent.preventDefault = function() {
	this.returnValue = false;
};
fixEvent.stopPropagation = function() {
 this.cancelBubble = true;
}

// Dean's forEach: http://dean.edwards.name/base/forEach.js
/*
	forEach, version 1.0
	Copyright 2006, Dean Edwards
	License: http://www.opensource.org/licenses/mit-license.php
*/

// array-like enumeration
if (!Array.forEach) { // mozilla already supports this
	Array.forEach = function(array, block, context) {
		for (var i = 0; i < array.length; i++) {
			block.call(context, array[i], i, array);
		}
	};
}

// generic enumeration
Function.prototype.forEach = function(object, block, context) {
	for (var key in object) {
		if (typeof this.prototype[key] == "undefined") {
			block.call(context, object[key], key, object);
		}
	}
};

// character enumeration
String.forEach = function(string, block, context) {
	Array.forEach(string.split(""), function(chr, index) {
		block.call(context, chr, index, string);
	});
};

// globally resolve forEach enumeration
var forEach = function(object, block, context) {
	if (object) {
		var resolve = Object; // default
		if (object instanceof Function) {
			// functions have a "length" property
			resolve = Function;
		} else if (object.forEach instanceof Function) {
			// the object implements a custom forEach method so use that
			object.forEach(block, context);
			return;
		} else if (typeof object == "string") {
			// the object is a string
			resolve = String;
		} else if (typeof object.length == "number") {
			// the object is array-like
			resolve = Array;
		}
		resolve.forEach(object, block, context);
	}
};