d = document;
w = window;
ns3 = ((d.images) && (w.screen)) ? false : true;
ns4 = ((d.captureEvents) && (!d.getElementById)) ? true : false;
ie4 = ((d.all) && (w.offscreenBuffering)) ? true : false; // IE >= 4.x
dom = (d.getElementById) ? true : false;

function nullo() {
if (ns3 || ns4) {
     window.document.layers.leins.visibility="hide";
     window.document.layers.lzwei.visibility="hide";
     window.document.layers.ldrei.visibility="hide";
     window.document.layers.lvier.visibility="hide";
     window.document.layers.lfuenf.visibility="hide";
     window.document.layers.lsechs.visibility="hide";
     window.document.layers.lsieben.visibility="hide";
     window.document.layers.lacht.visibility="hide";
     window.document.layers.lneun.visibility="hide";
     window.document.layers.lzehn.visibility="hide";
     window.document.layers.lelf.visibility="hide";
     window.document.layers.lzwoelf.visibility="hide";
}
if (dom) {
     window.document.getElementById("deins").style.visibility="hidden";
     window.document.getElementById("dzwei").style.visibility="hidden";
     window.document.getElementById("ddrei").style.visibility="hidden";
     window.document.getElementById("dvier").style.visibility="hidden";
     window.document.getElementById("dfuenf").style.visibility="hidden";
     window.document.getElementById("dsechs").style.visibility="hidden";
     window.document.getElementById("dsieben").style.visibility="hidden";
     window.document.getElementById("dacht").style.visibility="hidden";
     window.document.getElementById("dneun").style.visibility="hidden";
     window.document.getElementById("dzehn").style.visibility="hidden";
     window.document.getElementById("delf").style.visibility="hidden";
     window.document.getElementById("dzwoelf").style.visibility="hidden";
 }
 }

function eins() { nullo();
if (ns3 || ns4) { window.document.layers.leins.visibility="show"; return; }
if (dom) { window.document.getElementById("deins").style.visibility = "visible"; return; }
}

function zwei() { nullo();
if (ns3 || ns4) { window.document.layers.lzwei.visibility="show"; return; }
if (dom) { window.document.getElementById("dzwei").style.visibility = "visible"; return; }
}

function drei() { nullo();
if (ns3 || ns4) { window.document.layers.ldrei.visibility = "show"; return; }
if (dom) { window.document.getElementById("ddrei").style.visibility = "visible"; return; }
}

function vier() { nullo();
if (ns3 || ns4) { window.document.layers.lvier.visibility = "show"; return; }
if (dom) { window.document.getElementById("dvier").style.visibility = "visible"; return; }
}

function fuenf() { nullo();
if (ns3 || ns4) { window.document.layers.lfuenf.visibility = "show"; return; }
if (dom) { window.document.getElementById("dfuenf").style.visibility = "visible"; return; }
}

function sechs() { nullo();
if (ns3 || ns4) { window.document.layers.lsechs.visibility = "show"; return; }
if (dom) { window.document.getElementById("dsechs").style.visibility = "visible"; return; }
}

function sieben() { nullo();
if (ns3 || ns4) { window.document.layers.lsieben.visibility = "show"; return; }
if (dom) { window.document.getElementById("dsieben").style.visibility = "visible"; return; }
}

function acht() { nullo();
if (ns3 || ns4) { window.document.layers.lacht.visibility = "show"; return; }
if (dom) { window.document.getElementById("dacht").style.visibility = "visible"; return; }
}

function neun() { nullo();
if (ns3 || ns4) { window.document.layers.lneun.visibility = "show"; return; }
if (dom) { window.document.getElementById("dneun").style.visibility = "visible"; return; }
}

function zehn() { nullo();
if (ns3 || ns4) { window.document.layers.lzehn.visibility = "show"; return; }
if (dom) { window.document.getElementById("dzehn").style.visibility = "visible"; return; }
}

function elf() { nullo();
if (ns3 || ns4) { window.document.layers.lelf.visibility = "show"; return; }
if (dom) { window.document.getElementById("delf").style.visibility = "visible"; return; }
}

function zwoelf() { nullo();
if (ns3 || ns4) { window.document.layers.lzwoelf.visibility = "show"; return; }
if (dom) { window.document.getElementById("dzwoelf").style.visibility = "visible"; return; }
}