function an(was)
{
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		document.getElementById(was+"ober").href="javascript:aus(\'"+was+"\')";
}

function aus(was)
{
 		document.getElementById(was).style.display="none";
		document.getElementById(was+"ober").href="javascript:an(\'"+was+"\')";
}

function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
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       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;