function stopError()
{ return true; }
window.onerror = stopError;

function topTest()
{
 if (!top.onlinereserveren)
  {
   var newURL="http://hotels-boeken.nl/?"+self.location.href;
    if ( document.images ) 
     top.location.replace(newURL);
    else  top.location.href=newURL;
  }
}
topTest();