var sortedOn = 0;

function SortTable(sortOn) {

	var table = document.getElementById('results');
	var tbody = table.getElementsByTagName('tbody')[0];
	var rows = tbody.getElementsByTagName('tr');

	var rowArray = new Array();
	for (var i=0, length=rows.length; i<length; i++) {
		rowArray[i] = rows[i].cloneNode(true);
	}
	
	if (sortOn == sortedOn) { rowArray.reverse(); }
	else {
		sortedOn = sortOn;
		if (sortedOn == 0) {
			rowArray.sort(RowCompareNumbers);
		}
		else if (sortedOn == 3) {
			rowArray.sort(RowCompareDollars);
		}
		else {
			rowArray.sort(RowCompare);
		}
	}
	
	var newTbody = document.createElement('tbody');
	for (var i=0, length=rowArray.length; i<length; i++) {
		newTbody.appendChild(rowArray[i]);
	}
	
	table.replaceChild(newTbody, tbody);
}

function RowCompare(a, b) {

	var aVal = a.getElementsByTagName('td')[sortedOn].firstChild.nodeValue;
	var bVal = b.getElementsByTagName('td')[sortedOn].firstChild.nodeValue;
	return (aVal == bVal ? 0 : (aVal > bVal ? 1 : -1));
}

function RowCompareNumbers(a, b) {

	var aVal = parseInt(a.getElementsByTagName('td')[sortedOn].firstChild.nodeValue);
	var bVal = parseInt(b.getElementsByTagName('td')[sortedOn].firstChild.nodeValue);
	return (aVal - bVal);
}

function RowCompareDollars(a, b) {

	var aVal = parseFloat(a.getElementsByTagName('td')[sortedOn].firstChild.nodeValue.substr(1));
	var bVal = parseFloat(b.getElementsByTagName('td')[sortedOn].firstChild.nodeValue.substr(1));
	return (aVal - bVal);
}