// Highlighting form field
// onKeyUp="highlight(event)" onClick="highlight(event)" - Must be prresent in form tag

var highlightcolor="lightblue" // Input type color control

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

// Input types allowed
var intended=/INPUT|TEXTAREA|SELECT|OPTION/

// Click control
function checkel(which){
if (which.style&&intended.test(which.tagName)){
if (ns6&&eventobj.nodeType==3)
eventobj=eventobj.parentNode.parentNode
return true
}
else
return false
}

// Highlight control
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
}
}