function openfullscreen(url)
  {  var w = screen.width; 
     var h = screen.height; 
     var t = 0; 
     var l = 0;
     if (h<700)
     {  var windowprops = ',scrollbars=1';
     } 
     else
     {  var windowprops = ',scrollbars=0';
     }
     var popup = window.open(url,'','width=' + w + ',height=' + h + ',top=' + t + ',left=' + l + ',toolbar=0,location=0,directories=0,status=0,menubar=0' + windowprops);
     popup.moveTo(0,0)
     popup.resizeTo(w,h);
     popup.focus();
     /*var a,popupblock;
     a=window.open(url,'','fullscreen=1;');
     if (!a) popupblock = true;*/
  }