function SetCwinHeight(){
  var cwin=document.getElementById("cwin");
  if (document.getElementById){
      if (cwin && !window.opera) {
          if (cwin.contentDocument && cwin.contentDocument.body.offsetHeight)
              cwin.height = cwin.contentDocument.body.offsetHeight;
          else if(cwin.Document && cwin.Document.body.scrollHeight)
              cwin.height = cwin.Document.body.scrollHeight;
      }
  }
}