function neuAufbau()
{
if (window.innerHeight) wHeight = window.innerHeight;
else if (document.body && document.body.offsetHeight) wHeight = document.body.offsetHeight;
else wHeight = 0;
document.getElementById("divmain").style.height = wHeight-135;//177;
}

function showAsPopup(ref) {
   awindow=window.open(ref,'_popup','toolbar=no,location=no,status=yes,menubar=no,scrollbars=yes,resizable=yes,width=673,height=529,screenX=100,screenY=100');
   awindow.focus();
   return !awindow;
}

window.onresize = neuAufbau;