/**
*
*  Sortable HTML table
*  http://www.webtoolkit.info/
*
**/

function SortableTable (tableEl) 
{

	this.tbody = tableEl.getElementsByTagName('tbody');
	this.thead = tableEl.getElementsByTagName('thead');
	this.tfoot = tableEl.getElementsByTagName('tfoot');

	this.getInnerText = function (el) 
	{
		if (typeof(el.textContent) != 'undefined') return el.textContent;
		if (typeof(el.innerText) != 'undefined') return el.innerText;
		if (typeof(el.innerHTML) == 'string') return el.innerHTML.replace(/<[^<>]+>/g,'');
	}

	this.getParent = function (el, pTagName) 
	{
		if (el == null) 
			return null;
		else if (el.nodeType == 1 && el.tagName.toLowerCase() == pTagName.toLowerCase())
			return el;
		else
			return this.getParent(el.parentNode, pTagName);
	}

	this.sort = function (cell) 
	{

	    var column = cell.cellIndex;
	    var itm = this.getInnerText(this.tbody[0].rows[1].cells[column]);
		var sortfn = this.sortCaseInsensitive;

		if (itm.match(/\d\d[-]+\d\d[-]+\d\d\d\d/)) sortfn = this.sortDate; // date format mm-dd-yyyy
		if (itm.replace(/^\s+|\s+$/g,"").match(/^[\d\.]+$/)) sortfn = this.sortNumeric;

		this.sortColumnIndex = column;

	    var newRows = new Array();
	    for (j = 0; j < this.tbody[0].rows.length; j++) 
	    {
			newRows[j] = this.tbody[0].rows[j];
		}

		newRows.sort(sortfn);

		if (cell.getAttribute("sortdir") == 'down') 
		{
			newRows.reverse();
			cell.setAttribute('sortdir','up');
		} 
		else 
		{
			cell.setAttribute('sortdir','down');
		}

		for (i=0;i<newRows.length;i++) 
		{
			this.tbody[0].appendChild(newRows[i]);
		}

	}

	this.sortCaseInsensitive = function(a,b) 
	{
		aa = thisObject.getInnerText(a.cells[thisObject.sortColumnIndex]).toLowerCase();
		bb = thisObject.getInnerText(b.cells[thisObject.sortColumnIndex]).toLowerCase();
		if (aa==bb) return 0;
		if (aa<bb) return -1;
		return 1;
	}

	this.sortDate = function(a,b) 
	{
		aa = thisObject.getInnerText(a.cells[thisObject.sortColumnIndex]);
		bb = thisObject.getInnerText(b.cells[thisObject.sortColumnIndex]);
		date1 = aa.substr(6,4)+aa.substr(3,2)+aa.substr(0,2);
		date2 = bb.substr(6,4)+bb.substr(3,2)+bb.substr(0,2);
		if (date1==date2) return 0;
		if (date1<date2) return -1;
		return 1;
	}

	this.sortNumeric = function(a,b) 
	{
		aa = parseFloat(thisObject.getInnerText(a.cells[thisObject.sortColumnIndex]));
		if (isNaN(aa)) aa = 0;
		bb = parseFloat(thisObject.getInnerText(b.cells[thisObject.sortColumnIndex]));
		if (isNaN(bb)) bb = 0;
		return aa-bb;
	}

	// define variables
	var thisObject = this;
	var sortSection = this.thead;

	// constructor actions
	if (!(this.tbody && this.tbody[0].rows && this.tbody[0].rows.length > 0)) return;

	if (sortSection && sortSection[0].rows && sortSection[0].rows.length > 0) 
	{
		var sortRow = sortSection[0].rows[0];
	}
	else 
	{
		return;
	}

	for (var i=0; i<sortRow.cells.length; i++) 
	{
		sortRow.cells[i].sTable = this;
		sortRow.cells[i].onclick = function () 
		{
			this.sTable.sort(this);
			return false;
		}
	}

}