function resetTrStyle(id)
	{
		//clear the selected tr bgcolor.
		var trs=document.getElementsByTagName("tr"); 
		for (var i = 0; i < trs.length; i++) 
		{
			if(trs[i].id.indexOf("tr_")!=-1)
			{
				trs[i].bgColor ="#FFFFFF";
			}
		}
		
		if(id!=null)
		{
			var trSelected=document.getElementById("tr_"+id);
			trSelected.bgColor ="#FFFFCC";
		}
	}