[jQuery] Prevent Select from opening.

[Dave Maharaj :: WidePixels.com]

I have a select input that when clicked i want to prevent from dropping
down. How can this be done?
 
I only have this so far:
 
<script type="text/javascript"> 
  $(document).ready(function(){
$("#JobStateId").mousedown(function(){
        
      alert('clicked');
      return false;
 });
});
</script>
 
Dave