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  var bobo=document.getElementById("bobo");
  if (document.getElementById){
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<iframe marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"  style="margin-left:-8px"
        src="../Templet/TopTemp.html" id="bobo" onload="Javascript:SetCwinHeight()"   width="974px"></iframe>