function Hinweis ()
{
  Fenster1 = window.open("contact.htm", "Zweitfenster", "width=300,height=400,left=100,top=200");
  Fenster1.focus();
}
function Impress ()
{
  Fenster1 = window.open("impressum.htm", "Zweitfenster", "width=300,height=400,left=100,top=200");
  Fenster1.focus();
}