title: two Listboxes, One selection in javascript
body: <p>I am using asp.net (C#) and I need your help with this thing.</p>
  
  <p>I have two listboxes, one is bound to get a list of companies  from the DB (lstCompanies) and the other one is for the user to filter that companies (lstFilter).</p>
  
  <p>The problem occurs when the user selects from both listboxes and submit! so I need to do the following in JAVASCRIPT:</p>
  
  <p>When the user selects from lstCompanies, check if lstFilter is selected; I need to clear the selection for him. And vice versa!</p>
  
  <p>It has to be JS to avoid postbacks, and I am forced to run this webapp in IE.</p>