feniks7,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script>
$(function () {
$('#sp_model').change(function()
{
alert($(':selected', this).data('attr'));
});
})
</script>
</head>
<body>
<select id="sp_model">
<option data-attr="/url/file.ext1" value="somevalue">$NAME</option>
<option data-attr="/url/file.ext2" value="somevalue">$NAME</option>
<option data-attr="/url/file.ext3" value="somevalue">$NAME</option>
</select>
</body>
</html>