//Highlight form element- © Dynamic Drive (www.dynamicdrive.com)
        //For full source code, 100's more DHTML scripts, and TOS,
        //visit http://www.dynamicdrive.com

        var highlightcolor="lightblue"
        var ns6=document.getElementById&&!document.all
        var previous=''
        var eventobj                
                 
        //Regular expression to highlight only form elements
        var intended=/INPUT|TEXTAREA/

        //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;
            }
        }