function impressum()
{
window.open('http://www.memberbereiche.de/impressum.php','Info','width=300,height=300,left=0,top=0,screenX=0,screenY=0');
}
function bild(url)
{
var win2 = window.open(url,'Vorschau','width=400,height=480,left=0,top=0,screenX=0,screenY=0');
win2.focus();
}