addEvent(window, "load", sortables_init);

var SORT_COLUMN_INDEX;

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);
		ts_makeSortable(thisTbl);
	    }
	}
}
								    
function ts_makeSortable(table) {
    if (table.rows && table.rows.length > 0) {
	var 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];
	var txt = ts_getInnerText(cell);
	cell.innerHTML = '<a href="#" class="sortheader" onclick="ts_resortTable(this);return false;">'+txt+'<span class="sortarrow">&nbsp;&nbsp;&nbsp;</span></a>';
    }
}

function ts_getInnerText(el) {
    if (typeof el == "string") return el;
    if (typeof el == "undefined") { return el };
    if (el.innerText) return el.innerText;	//Not needed but it is faster
    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]);
	    break;
	    case 3:	//TEXT_NODE
		str += cs[i].nodeValue;
	    break;
	}
    }
    return str;
}

function ts_resortTable(lnk) {
    // get the span
    var span;
    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);
    var td = lnk.parentNode;
    var column = td.cellIndex;
    var table = getParent(td,'TABLE');
    // Work out a type for the column
    if (table.rows.length <= 1) return;
    var itm = ts_getInnerText(table.rows[1].cells[column]);
    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 firstRow = new Array();
    var newRows = new Array();
    for (i=0;i<table.rows[0].length;i++) { firstRow[i] = table.rows[0][i]; }
	for (j=1;j<table.rows.length;j++) { newRows[j-1] = table.rows[j]; }
	    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');
	    }
	    // We appendChild rows that already exist to the tbody, so it moves them rather than creating new ones
	    // don't do sortbottom rows
	    for (i=0;i<newRows.length;i++) { if (!newRows[i].className || (newRows[i].className && (newRows[i].className.indexOf('sortbottom') == -1))) table.tBodies[0].appendChild(newRows[i]);}
		//do sortbottom rows only
		for (i=0;i<newRows.length;i++) { 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]);
	    bb = ts_getInnerText(b.cells[SORT_COLUMN_INDEX]);
	    if (aa.length == 10) {
	        dt1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
	    } else {
	        yr = aa.substr(6,2);
	        if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
	        dt1 = yr+aa.substr(3,2)+aa.substr(0,2);
	    }
	    if (bb.length == 10) {
		dt2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
	    } else {
		yr = bb.substr(6,2);
		if (parseInt(yr) < 50) { yr = '20'+yr; } else { yr = '19'+yr; }
		dt2 = yr+bb.substr(3,2)+bb.substr(0,2);
	    }
	    if (dt1==dt2) return 0;
	    if (dt1<dt2) return -1;
	    return 1;
	}

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

function ts_sort_numeric(a,b) { 
    aa = parseFloat(ts_getInnerText(a.cells[SORT_COLUMN_INDEX]));
    if (isNaN(aa)) aa = 0;
    bb = parseFloat(ts_getInnerText(b.cells[SORT_COLUMN_INDEX])); 
    if (isNaN(bb)) bb = 0;
    return aa-bb;
}

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