function color(id, c1, c2) { 
	if(document.getElementById(id)) {
		var trs = (document.getElementById(id).getElementsByTagName("tbody").length) ? document.getElementById(id).getElementsByTagName("tbody")[0].getElementsByTagName("tr") : document.getElementById(id).getElementsByTagName("tr"); 
		for(var i=0; i<trs.length; i++) 
		trs[i].style.backgroundColor = (i%2) ? c1 : c2; 
	}
}

window.onload = function() { 
	color("daten", "#c0c0c0", "#edf3fe");
	externalLinks();
}
				function externalLinks() {
				if(!document.getElementsByTagName) return;
				var links,a,i;
				links = document.getElementsByTagName("a");
					for(i=0;i<links.length;i++) {
						a = links[i];
							if(a.getAttribute("rel") && a.getAttribute("rel").indexOf("external") > -1) {
								a.onclick = function() {
									window.open(this.href);
								return false;
				  	   	   	 }
				  	   	 }
				  	 }
				}