var highlightcolor="EEEEEE";

var ns6=document.getElementById&&!document.all;
var previous='';
var eventobj;

//Regular expression to highlight only form elements
var intended=/INPUT|TEXTAREA|SELECT|OPTION/;

//Function to check whether element clicked is form element
function checkel(which){
	if (which.style&&intended.test(which.tagName)){
		if (ns6&&eventobj.nodeType==3)
			eventobj=eventobj.parentNode.parentNode;
		return true;
	}
	else
		return false;
}

//Function to highlight form element
function highlight(e){
	eventobj=ns6? e.target : event.srcElement;
	if (previous!=''){
		if (checkel(previous))
			previous.style.backgroundColor='';
		previous=eventobj;
		if (checkel(eventobj))
			eventobj.style.backgroundColor=highlightcolor;
	}
	else{
		if (checkel(eventobj)) 
			eventobj.style.backgroundColor=highlightcolor;			
		previous=eventobj;
	}
}