function ch_cont (site1,site2) {
	main.location.href = site1;
	info.location.href = site2;
}

function refpopup (target) {
  pp = window.open(target, "Referenzen", "width=520,height=600,right=50,top=200,scrollbars=yes,location=no,menubar=no,resizable=no,status=no,tollbar=no");
  pp.focus();
}