function getElementsByClass(searchClass, node, tag) 
{
	var classElements = new Array();
	
	if ( node == null )
		node = document;
		
	if ( tag == null )
		tag = '*';
		
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	
	for (i = 0, j = 0; i < elsLen; i++) 
	{
		if ( pattern.test(els[i].className) ) 
		{
			classElements[j] = els[i];
			j++;
		}
	}
	
	return classElements;
}

function setbg()
{
	var objNode, strLink, objCell;

	// Check we're working with a DOM compliant browser
	if (document.getElementById && document.createElement)
	{
		var objBills = getElementsByClass('bills');
		
		for (var i=0; i<objBills.length; i++)
		{
			var objRows = objBills[i].getElementsByTagName('tr');
			
			for (var j=0; j<objRows.length; j=j+2)
			{
				objNode = objRows[j];
				objNode.bgColor = '#EDEDED';			
			}
		}
	}
}