function OpenKANZLEI() {

add = window.open("http://www.personalzentrum.de/m_kanzlei.html","Kanzlei","left=25,top=25,width=600,height=420,location=0,menubar=0,personalbar=0,status=0,scrollbars=no");
add.focus();
}

function OpenBZ() {

add = window.open("http://www.personalzentrum.de/m_bz.html","BZ","left=25,top=25,width=600,height=270,location=0,menubar=0,personalbar=0,status=0,scrollbars=no");
add.focus();
}

function OpenREF() {

add = window.open("http://www.berufszentrum.de/m_referenzen.html","REF","left=25,top=25,width=600,height=400,location=0,menubar=0,personalbar=0,status=0,scrollbars=yes");
add.focus();
}