function setExternalLinks() {
	    if (!document.getElementsByTagName) {
	        return null;
	    }
	    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.setAttribute("target", "blank");
	        }
	    }
}



	function explan(inh) {

	document.getElementById(inh).style.display='block'
	}

	function weg(inh) {

	document.getElementById(inh).style.display='none'
	}