Need combo dropdown box script idea

By analyzing your question, I came up to a decision to reply.
As your main aim is to use the option for redirecting the page after selecting various option to various page, why can't you do it by using jquery. Jquery is a Javascript library. Its really simple to use.

Try below sample code.

$(document).ready( function() {
$('#myId').change( function() {
location.href = $(this).val();
});
});


< select id="myId" >
< option value="#">Select a Option
< option value="1111.htm">Location
< option value="2222.htm">Other
< /select >


When you select the Location option, you will be redirect to the location.html. This is done by jquery. The script is loaded after document load. As you change the option, jquery change the location of href and redirect to that location.

Hope this helps you. Happy Coding :)