function email()
{
window.open("email.html","email","width=520,height=520,scrollbars=no,toolbar=yes,status=no,locationbar=no,resizable=yes");
}

function impressum()
{
window.open("impressum.html","impressum","width=240,height=360,scrollbars=no,toolbar=no,status=no,locationbar=no,resizable=yes").focus();
}