function edt(str)
{
   xmlHttp=GetXmlHttpObject()
   if (xmlHttp==null)
   {
     alert ("Browser does not support HTTP Request")
     return
   }
  var url="edt.php"
  url=url+"?q="+str
  url=url+"&sid="+Math.random()
  xmlHttp.onreadystatechange=stateChanged
  xmlHttp.open("GET",url,true)
  xmlHttp.send(null)
}