Firefox下实现fireEvent


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document  </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD>

<BODY>
<select onchange="javascript:alert('a');" id="select1"> <option>1 </option> <option>2 </option> </select>
<INPUT TYPE="button" onclick="ccc()">
    <script type="text/javascript">
    //<![CDATA[
function ccc(){
var t=document.getElementById('select1')
 if(   document.all   )  
  {  
          t.fireEvent(   "onchange"   );  
  }  
  else  
  {  
          var   evt   =   document.createEvent('HTMLEvents');  
          evt.initEvent('change',true,true);  
          t.dispatchEvent(   evt   );  
  }
}

//javascript:document.getElementById('select1').fireEvent('onchange');
 
    //]]>
 </script>
</BODY>
</HTML>