function wochtag(datei) {
var Datum = new Date();
today= new Date();
secn=  today.getSeconds();
tag = Datum.getDay();
tgzahl = Datum.getDate()
  if(tag==0)wt="So";
  if(tag==1)wt="Mo";
  if(tag==2)wt="Di";
  if(tag==3)wt="Mi";
  if(tag==4)wt="Do";
  if(tag==5)wt="Fr";
  if(tag==6)wt="Sa";

document.location.href='gipfel/gipfelstart/index'+ wt +'.html','name','toolbar=no,location=yes,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=no,copyhistory=no,width=800,height=600' ;
//ab hier statischer oeffner>
//document.location.href='gipfel/gipfelstart/index.html','name','toolbar=no,location=yes,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=no,copyhistory=no,width=800,height=600' ;

  }