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