function jump1() {
    ziel=document.form1.menu1.options[document.form1.menu1.selectedIndex].value;
    if(ziel == "")
    {
    return;
   document.form1.menu1.selectedIndex = 0;
    }
    else
	{
	parent.location=ziel;
     document.form1.menu1.selectedIndex = 0;
  }
    }

  function jump2() {
    ziel=document.form2.menu2.options[document.form2.menu2.selectedIndex].value;
    if(ziel == "")
    {
    return;
   document.form2.menu2.selectedIndex = 0;
    }
    else
	{
	parent.location=ziel;
     document.form2.menu2.selectedIndex = 0;
  }
    }

  function jump3() {
    ziel=document.form3.menu3.options[document.form3.menu3.selectedIndex].value;
     if(ziel == "")
    {
    return;
   document.form3.menu3.selectedIndex = 0;
    }
    else
	{
	parent.location=ziel;
     document.form3.menu3.selectedIndex = 0;
  }
    }