var highlightColor="#C9C2CF";
var normalColor="#FFFFFF";
var previous=null;
var intended=/INPUT|TEXTAREA|SELECT|OPTION/;

function highlight(e)
{
	if(previous!=null)
		previous.style.backgroundColor=normalColor;

	var eventObj=e.target?e.target:window.event.srcElement;
	
	if(!intended.test(eventObj.tagName))
		return;
	
	previous=eventObj;
	eventObj.style.backgroundColor=highlightColor;
}