// JavaScript Document

var highlightcolor="lightyellow"

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
	}
}