<select id="Select1">
<option value="aa,bb"></option>
</select>
<script>
var str = $("#Select1").val();
var pp = str.split(/W+/)[1];
alert(pp);
</script>
<select id="Select1">
<option value="aa,bb"></option>
</select>
<script>
var str = $("#Select1").val();
var pp = str.split(/W+/)[1];
alert(pp);
</script>