function eins()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/einzel_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}
function zwei()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/doppel_st_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}
function drei()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/doppel_kl_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}
function vier()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/familien_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}
function fuenf()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/junior_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}
function sechs()
{
var winl = (screen.width - 775) / 2;
var wint = (screen.height - 580) / 2;
var newWindow = window.open('tub_pr/kaiser_plan.html','','height=520,width=750,top='+wint+',left='+winl+',toolbar=no,scrollbars=no');
}