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)
			ventobj=eventobj.parentNode.parentNode;
		return true;
	}
	else
		return false;
}

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;
	}
}