Mega Code Archive
Set multiple value for select
<![CDATA[
< html>
<head>
<script type="text/javascript" src="js/jquery-1.3.2.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#multiple").val(["Multiple2", "Multiple3"]);
});
</script>
</head>
<body>
<body>
<select id="multiple" multiple="multiple">
<option>Multiple</option>
<option>Multiple2</option>
<option>Multiple3</option>
</select>
</body>
</html>
]]>