var langprimary= navigator.language;
var langsecondary= navigator.userAgent;
var ziel=document.location.toString();
//Strip out langParam

if(ziel.indexOf("L") < 0){

if (langprimary.indexOf("en") > 0 || langsecondary.indexOf("en") > 0){window.location.href=ziel+"?L=1";}
if (langprimary.indexOf("cn") > 0 || langsecondary.indexOf("cn") > 0){window.location.href=ziel+"?L=2";}
if (langprimary.indexOf("zh") > 0 || langsecondary.indexOf("zh") > 0){window.location.href=ziel+"?L=2";}
if (langprimary.indexOf("tw") > 0 || langsecondary.indexOf("tw") > 0){window.location.href=ziel+"?L=2";}

if (langprimary.indexOf("de") < 0 || langsecondary.indexOf("de") < 0){window.location.href=ziel+"?L=1";}

}