using jump menu

[snh]

I am using a jump menu to select multiple drop down boxes in a form which are related to the choice you make in the first drop down box.  The problem is that the page reloads and everything before this tag is cleared.  I want to be able to repost the data.  I know that I need to use sessions in my code but I dont know exactly how to use them for this case.

 

My code is similar to this:

 

<select id="Instance_Type111" name="mcate" onchange="MM_jumpMenu('parent',this,0)">

 

      <option value="0">Select</option>

<?php

-->I then query my data from a database and use similar code for the second drop down box.

 

 

Thanks so much! any help is useful!