var overflowy="";

if (is_ie4up) {
  overflowy = "overflow-y:scroll;";
}

document.write('<style type="text/css"><!--'+
  '#xxcontent {'+overflowy+' }'+ 
  '#content_zondervlucht {'+overflowy+' }'+ 
  ' div.openlink {'+overflowy+' }'+ 
  '--></style>');
  
  


function checkAvailableHeight() {
	var container = document.getElementById("route");
	if (container)
		container.style.minHeight = (document.body.clientHeight > 865)? "29em" : "21em";
}