function ZweiFrames(URI1,F1,URI2,F2) {
  Frame1=eval("parent."+F1);
  Frame2=eval("parent."+F2);
  Frame1.location.href = URI1;
  Frame2.location.href = URI2;
}
function ZweiFramesBack(F1,F2) {
  Frame1=eval("parent."+F1);
  Frame2=eval("parent."+F2);
  Frame1.history.back();
 if (!window.opera) window.setTimeout("Frame2.history.back()",10);
}
function ZweiFramesForward(F1,F2) {
  Frame1=eval("parent."+F1);
  Frame2=eval("parent."+F2);
  Frame1.history.forward();
 if (!window.opera) window.setTimeout("Frame2.history.forward()",10);
}