jquery är väl enkelt?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$("#form :input").focus(function(){
$(this).css({background: "#ff0"});
}).blur(function(){
$(this).css({background: ""});
});
});
</script>
</head>
<body>
<form id="form">
<input type="text" />
<textarea cols="60" rows="10"></textarea>
</form>
</body>
</html>
eller gäller det när du markera ett fält så skall alla fält i det formulär markeras? Om så så kan man vara lite lat:
<script type="text/javascript">
$(function() {
$("#form :input").focus(function(){
$("#form :input").css({background: "#ff0"});
}).blur(function(){
$("#form :input").css({background: ""});
});
});
</script>

