addEvent(window, "load", sortables_init);

var SORT_COLUMN_INDEX;
var sortUp;
var multipleHeaders;
var firstRow;

function sortables_init() {
    // Find all tables with class sortable and make them sortable
    if (!document.getElementsByTagName) return;
    tbls = document.getElementsByTagName("table");
    for (ti=0;ti<tbls.length;ti++) {
        thisTbl = tbls[ti];
        if (((' '+thisTbl.className+' ').indexOf("sortable") != -1) && (thisTbl.id)) {
            //initTable(thisTbl.id);
            multipleHeaders = false;
            
            if ((' '+thisTbl.className+' ').indexOf("multipleHeaders") != -1) {
				multipleHeaders = true;
            }
            ts_makeSortable(thisTbl);
        }
    }
}

function ts_makeSortable(table) {
    if (table.rows && table.rows.length > 0) {
       firstRow = table.rows[0];        
    }
    if (!firstRow) return;
    
    // We have a first row: assume it's the header, and make its contents clickable links
    for (var i=0;i<firstRow.cells.length;i++) {
        var cell = firstRow.cells[i];
        if ((' '+cell.className+' ').indexOf("nosort") == -1) 
        {
			var txt = ts_getInnerText(cell, true);
						
			cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this,' + i + ');return false;">'+txt+'<span class="sortarrow"></span></a>';			
		}
    }
}

function ts_getInnerText(el, checkInnerHTML) {
	
	if (typeof el == "string") return el;
	if (typeof el == "undefined") {return '';}	
	if (el.nodeName == "IMG") {return ts_getInnerTextImage(el); }	
	
	if (checkInnerHTML == true)		
		if (el.innerHTML) return el.innerHTML;
	else
		if (el.innerText) return el.innerText;
	
	/////////////////////////////////////
	// Tom, not sure what of this code you added to debug, but I think using innerHTML
	// instead of innerText will work
	// e.g. return el.innerHTML;
	/////////////////////////////////////
	var str = "";

	var cs = el.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++) {
		
		switch (cs[i].nodeType) {
			case 1: //ELEMENT_NODE
				str += ts_getInnerText(cs[i], checkInnerHTML);
				break;
			case 3:	//TEXT_NODE
				str += cs[i].nodeValue;
				break;
		}
	}	
	return str;
}

function ts_getInnerTextImage(el)
{
	var str = '';
	
	if (el.attributes.getNamedItem("onMouseOver"))
		str = '<IMG src="' + el.src + '" OnMouseOver="' + el.attributes.getNamedItem("onMouseOver").nodeValue + '" OnMouseOut="' + el.attributes.getNamedItem("onMouseOut").nodeValue + '" title="' + el.attributes.getNamedItem("title").nodeValue + '">';
	else
		str = '<IMG src="' + el.src + '">';
	
	return (str);
}

function ts_resortTable(lnk, cellIndex) {
    // get the span
    var span;
    var cellClass;
    var highlightIndex;
    
    for (var ci=0;ci<lnk.childNodes.length;ci++) {		
        if (lnk.childNodes[ci].tagName && lnk.childNodes[ci].tagName.toLowerCase() == 'span') span = lnk.childNodes[ci];
    }
    
    var spantext = ts_getInnerText(span, false);
    var td = lnk.parentNode;
    //var column = td.cellIndex;
    var column = cellIndex || td.cellIndex;
    var table = getParent(td,'TABLE');
    
    // Set default sort direction
    if (span.getAttribute("sortdir")==null) {
		if ((' '+td.className+' ').indexOf("sortasc") != -1) {
			span.setAttribute('sortdir','up');
		}
		else
			span.setAttribute('sortdir','down');
    }
    
    if (span.getAttribute("sortdir") == 'down') {
        sortUp = 0;
    } else {
        sortUp = 1;
    }
    
    // Work out a type for the column
    if (table.rows.length <= 1) return;
        
    if ((' '+td.className+' ').indexOf("sortsalary") != -1) 
    {
		sortfn = ts_sort_salary;
	}
	else if ((' '+td.className+' ').indexOf("sortnum") != -1) 
	{
		sortfn = ts_sort_numeric;
	}
	else if ((' '+td.className+' ').indexOf("sortWithText") != -1) 
	{
		sortfn = ts_sort_numWithText;
	}
	else if ((' '+td.className+' ').indexOf("sortDate") != -1) 
	{
		sortfn = ts_sort_date;
	}
    else 
    {
		var iIdx=1;
		var itm = ts_getInnerText(table.rows[iIdx].cells[column], false);

		while (escape(itm)=='%A0' && iIdx<table.rows.length){
			iIdx++;
			var itm = ts_getInnerText(table.rows[iIdx].cells[column], false);					
		}
		
		sortfn = ts_sort_caseinsensitive;
		if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d\d\d$/)) sortfn = ts_sort_date;
		if (itm.match(/^\d\d[\/-]\d\d[\/-]\d\d$/)) sortfn = ts_sort_date;
		if (itm.match(/^[£$]/)) sortfn = ts_sort_currency;
		if (itm.match(/^[\d\.]+$/)) sortfn = ts_sort_numeric;
    }
    
    
    SORT_COLUMN_INDEX = column;
	var tempRows = new Array();
    var newRows = new Array();
    var count = 0;
    var countHeader = 0;
    var tempHeaderRows = new Array();
    var canChange = true;
    for (j=1;j<table.rows.length;j++) {	
		if ((j - countHeader) % 15 != 0 || multipleHeaders == false) {	
			newRows[count] = table.rows[j];
			count++;
			
			if ((j - countHeader) % 15 == 1 && canChange == true) {
				countHeader++;
				canChange = false;
			}
		} else if ((j - countHeader) % 15 == 0 && canChange == false) {
			tempHeaderRows[countHeader - 1] = table.rows[j];
			canChange = true;
		}
	}
	
	newRows.sort(sortfn);
	
	if (span.getAttribute("sortdir") == 'down') {
        ARROW = '&nbsp;&nbsp;&uarr;';
        newRows.reverse();
        span.setAttribute('sortdir','up');
    } else {
        ARROW = '&nbsp;&nbsp;&darr;';
        span.setAttribute('sortdir','down');
    }
	
    // Set correct row class
    var rowCount=0;
    var cellCount = 0;
    for (j=0;j<newRows.length;j++) { 		
		if (newRows[j].className.indexOf('sortbottom') == -1) {
			if (newRows[j].className.indexOf('highlight') == -1) 
			{
				if (rowCount % 2){newRows[j].className='';}
				else {newRows[j].className='alternate';}
			}
			
			// Set hightlight on column
			for (k=0;k<newRows[j].cells.length;k++) { 		
				cellClass=newRows[j].cells[k].className;
				cellClass = cellClass.replace('althighlight', '');
				cellClass = cellClass.replace('highlight', '');
					
				highlightIndex=(' '+cellClass+' ').indexOf("highlight");
				altHighlightIndex=(' '+cellClass+' ').indexOf("althighlight");
				if (k==SORT_COLUMN_INDEX) {
					if (rowCount % 2) {
						newRows[j].cells[k].className=cellClass + ' althighlight';
					} else {
						newRows[j].cells[k].className=cellClass + ' highlight';
					}
				}
				else 
					newRows[j].cells[k].className = cellClass;
			}
			
			rowCount++;
		}		
	}
	
    // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
    // don't do sortbottom rows   
    countHeader = 0; 
    for (i=0;i<newRows.length;i++) { 
		//alert(i + ' ' + newRows[i].cells[0].innerHTML + ' ---- ' + newRows[i].className);
		if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))){
			if (i % 15 == 0 && multipleHeaders == true && i > 0) {
				table.tBodies[0].appendChild(tempHeaderRows[countHeader]);
				countHeader++;
			}
			table.tBodies[0].appendChild(newRows[i]);
		}		
	}
    // do sortbottom rows only    
    for (i=0;i<newRows.length;i++) { 
		//alert(i + ' ' + newRows[i].cells[0].innerHTML + ' ---- ' + newRows[i].className);
		if (newRows[i].className && (newRows[i].className.indexOf('sortbottom') != -1)) {			
			table.tBodies[0].appendChild(newRows[i]);
		}
	}
    
    // Delete any other arrows there may be showing
    /*var allspans = document.getElementsByTagName("span");
    for (var ci=0;ci<allspans.length;ci++) {
        if (allspans[ci].className == 'sortarrow') {
            if (getParent(allspans[ci],"table") == getParent(lnk,"table")) { // in the same table as us?
                allspans[ci].innerHTML = '&nbsp;&nbsp;&nbsp;';
            }
        }
    }*/
        
    //span.innerHTML = ARROW;
}

function getParent(el, pTagName) {
	if (el == null) return null;
	else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())	// Gecko bug, supposed to be uppercase
		return el;
	else
		return getParent(el.parentNode, pTagName);
}
function ts_sort_date(a,b) {
    // y2k notes: two digit years less than 50 are treated as 20XX, greater than 50 are treated as 19XX
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false);
    
    
    yr1 = aa.substring(aa.lastIndexOf('/') + 1, aa.length);
    
    day1 = aa.substring(aa.indexOf('/') + 1, aa.lastIndexOf('/'));
    if (day1.length == 1) {
		day1 = '0' + day1;
    }
    
    month1 = aa.substring(0, aa.indexOf('/'));
    if (month1.length == 1) {
		month1 = '0' + month1;
    }
    
    dt1 = yr1 + month1 + day1;
    
    yr2 = bb.substring(bb.lastIndexOf('/') + 1, bb.length);
    
    day2 = bb.substring(bb.indexOf('/') + 1, bb.lastIndexOf('/'));
    if (day2.length == 1) {
		day2 = '0' + day2;
    }
    
    month2 = bb.substring(0, bb.indexOf('/'));
    if (month2.length == 1) {
		month2 = '0' + month2;
    }
    
    dt2 = yr2 + month2 + day2;
    
    if (dt1==dt2) return 0;
    if (dt1<dt2) return -1;
    return 1;
}

function ts_sort_currency(a,b) { 
    aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false).replace(/[^0-9.]/g,''));
    if (isNaN(aa)) aa = 0;
    
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false).replace(/[^0-9.]/g,''));
	if (isNaN(bb)) bb = 0;
	
	return aa-bb;
}

function ts_sort_numeric(a,b) { 
    aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false));
    if (isNaN(aa)) aa = -1;
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false)); 
    if (isNaN(bb)) bb = -1;
    return aa-bb;
}

function ts_sort_numWithText(a,b) { 
	var naValue = 0;
	
	if (sortUp == 1) {
		naValue = 1000000;
	}
	if (ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false) == "N/A")
		aa = naValue;
	else
		aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false));
		
    if (isNaN(aa)) aa = -1;
    
    if (ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false) == "N/A")
		bb = naValue;
	else
		bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false)); 
		
    if (isNaN(bb)) bb = -1;
    return aa-bb;
}

function ts_sort_caseinsensitive(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false).toLowerCase();
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}

function ts_sort_salary(a,b) {
    var a_adj, b_adj;
    
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false).toLowerCase();
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false).toLowerCase();
     
    if (aa.lastIndexOf('k') != -1)
    {		
		a_adj	= aa.substring(1,aa.length - 1);
		a_adj	= a_adj.replace(/[^0-9.]/g,'');
		a_adj	= Number(a_adj * 1000);		
    }
    else if (aa.lastIndexOf('m') != -1)
    {
		a_adj	= Number(aa.substring(1,aa.length-1) * 1000000);
    }
    else
    {
		a_adj	= aa.substring(1,aa.length);
		a_adj	= Number(a_adj.replace(/[^0-9.]/g,''));
    }
    
    if (bb.lastIndexOf('k') != -1)
    {
		b_adj	= bb.substring(1,bb.length - 1);
		b_adj	= b_adj.replace(/[^0-9.]/g,'');
		b_adj	= Number(b_adj * 1000);		
    }
    else if (bb.lastIndexOf('m') != -1)
    {
		b_adj	= Number(bb.substring(1,bb.length-1) * 1000000);
    }
    else
    {
		b_adj	= bb.substring(1,bb.length);
		b_adj	= Number(b_adj.replace(/[^0-9.]/g,''));
    }
        
    if (a_adj==b_adj) return 0;
    if (a_adj<b_adj) return -1;
    return 1;
}

function ts_sort_default(a,b) {
    aa = ts_getInnerText(a.cells[SORT_COLUMN_INDEX], false);
    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX], false);
    if (aa==bb) return 0;
    if (aa<bb) return -1;
    return 1;
}

function addEvent(elm, evType, fn, useCapture)
// addEvent and removeEvent
// cross-browser event handling for IE5+,  NS6 and Mozilla
// By Scott Andrew
{
  if (elm.addEventListener){
    elm.addEventListener(evType, fn, useCapture);
    return true;
  } else if (elm.attachEvent){
    var r = elm.attachEvent("on"+evType, fn);
    return r;
  } else {
    alert("Handler could not be removed");
  }
}