// with MIT license from
// http://kryogenix.org/code/browser/sorttable/

var scolix;
var lstabid = false;
var rev = false;

function sortables_init(ts_clear)
{
	if (ts_clear)
	{
		lstabid = false;
		rev = false;
	}
	// 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))
			ts_makeSortable(thisTbl);
	}
	if (lstabid)
	{
		var table = document.getElementById (lstabid);
		sortTable (table, scolix, rev);
	}
}

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, '+i+');return false;">' + 
			txt+'<span class="sortarrow">&nbsp;&nbsp;</span></a>';
		if (!rev && cell.getAttribute("sortdir"))
		{
			rev = cell.getAttribute("sortdir");
			scolix = i;
			lstabid = table.id;
		}
	}
}

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,clid)
{
	// 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 = clid || td.cellIndex;
	var table = getParent(td,'TABLE');

	if (lstabid == table.id && scolix == column && rev)
	{
		rev = (rev == "up") ? "down" : "up";
	}
	else
	{
		rev = (span.getAttribute("sortdir") == 'down') ? "up":"down";
		lstabid = table.id;
		scolix = column;
	}
	ARROW = "&nbsp;" + ((rev=="up")?"&uarr":"&darr;");
	span.setAttribute('sortdir',rev);

	sortTable (table, column, rev);

	// 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')
		{
			// in the same table as us?
			if (getParent(allspans[ci],"table") == getParent(lnk,"table"))
				allspans[ci].innerHTML = '&nbsp;&nbsp;';
		}
	}
	span.innerHTML = ARROW;
}

function sortTable (table, column, rev)
{
	// 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;
	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 (rev=="up") newRows.reverse();
	// 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]);
	}
}

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

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

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

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