function PopUpWindow(filename,windowname,toolbar,location,directories,status,menubar,scrollbars,resizable,copyhistory,_width,_height)
 {
  window.open(filename,windowname,"toolbar="+toolbar+",location="+location+",directories="+directories+",status="+status+",menubar="+menubar+",scrollbars="+scrollbars+",resizable="+resizable+",copyhistory="+copyhistory+",width="+_width+",height="+_height+"");
 }
function GO(url) {PopUpWindow(url,'Routebeschrijving',0,0,0,1,0,1,0,0,550,600)}