function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
 try {
  document.execCommand("BackgroundImageCache", false, true);
} catch(e) {}

}
window.onload = externalLinks;

function zoek(el,zoek) {
	if (el.value=='Zoeken') el.value='';
	else {el.value=zoek;el.select();}
}