function fetch_url(url){
  url += "&date="+Date();
  if (document.all)
   {
      // IE version
      try {
      var xml = new ActiveXObject("Microsoft.XMLHTTP");
      xml.Open( "GET", url, false);
      xml.Send()
      //document.getElementById(lyr).innerHTML=xml.responseText;
      } catch (e) {
      var xml = new ActiveXObject("MSXML2.XMLHTTP.4.0");
      xml.Open( "GET", url, false);
      xml.Send()
      //document.getElementById(lyr).innerHTML=xml.responseText;
      }
   }
   else
   {
      // Mozilla/Netscrap 6+ version
            var xml=new XMLHttpRequest();
            xml.open("GET",url,false);
            xml.send(null);
            //document.getElementById(lyr).innerHTML=xml.responseText;
   }
   // RESPUESTA DE URL
   document.write (xml.responseText);
   
}