function fenster_1() {
fenster=window.open("baer.htm","","width=340,height=510,top=40,left=40,resizable=no,scrollbars"); 
}
function fenster_2() {
fenster=window.open("statue.htm","","width=340,height=510,top=40,left=40,resizable=no,scrollbars");
}
function fenster_3() {
fenster=window.open("saeule.htm","","width=340,height=510,top=40,left=40,resizable=no,scrollbars");
}

function fenster_4() {
fenster=window.open("baer2.htm","","width=340,height=510,top=40,left=40,resizable=no,scrollbars");
}