function swlang() {
if(!document.location.href.split("page=")[1]) { document.location.href="/index.php?page=en_willkommen"; }
else {
if(document.location.href.split("page=")[1].split("_")[0]=="de") { document.location.href=document.location.href.replace(/de_/,"en_"); }
if(document.location.href.split("page=")[1].split("_")[0]=="en") { document.location.href=document.location.href.replace(/en_/,"de_"); }
}}