title: Fire onchange for combo box programatically using javascript in IE not working
body: <p>I want to call onchange function dynamically when user change value of another combo box.
  My code is as under :</p>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;select name="vbitratecontrol0" id="combo1" onchange="set()"&gt;;
        &lt;option value="0"&gt;None&lt;/option&gt;
        &lt;option value="1"&gt;A&lt;/option&gt;
        &lt;option value="2"&gt;B&lt;/option&gt;
    &lt;/select&gt;
  </code></pre>
  
  <p><strong>Javascript</strong></p>
  
  <pre><code>function fun(){
        document.getElementById(combo1).onChange();
  }
  </code></pre>
  
  <p>when function fun is called, onchange of combo1 should be fired which is working fine in FF but not in IE6,7,8.
  fun I m calling from another method.</p>
  
  <p>Please help...
  Thanks</p>