function e(id)
{
	return document.getElementById(id)?document.getElementById(id):false;
} 




  
function onRollOver(img_obj){
	img_obj.src = img_obj.src.split("-off").join("-on");
}

function onRollOut(img_obj){
	img_obj.src = img_obj.src.split("-on").join("-off");	
}  






	function setAlpha(obj_ref, percentage) {
			if (obj_ref.filters && obj_ref.filters[0]) {
				if (typeof obj_ref.filters[0].opacity == "number") { //if IE6+
					obj_ref.filters[0].opacity = percentage;
				} else { //else if IE5.5-
					obj_ref.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity="+percentage+")";
				}
			} else if (obj_ref.style.MozOpacity) {
				obj_ref.style.MozOpacity = percentage / 101;
			} else if (obj_ref.style.KhtmlOpacity) {
				obj_ref.style.KhtmlOpacity = percentage / 100;
			}
		}