var showimage = ("document.images");
if (showimage)
{
mouseover = new picArray(4);
mouseover[1].src = "img/bauen_wohngebiet.png";
mouseover[2].src = "img/bauen_wohngebiet-a.png";
mouseover[3].src = "img/bauen_wohngebiet-s.png";
mouseover[4].src = "img/bauen_wohngebiet-l.png";
}
function picArray(n) {
this.length = n
for (var i = 1; i<=n; i++) {
this[i] = new Image();
}
return this;
}
function showimg(pic, num) {
if (showimage) {
pic.src = mouseover[num].src;
}
}

function zurueck()
{
var ns4=document.layers
if (ns4)
{
window.back();
}
else 
history.back();
}

//---------------------------------------

if (document.layers)  {
     ns = 1; ie = 0;
} else {
     ns = 0; ie = 1;
     }

var i = 1;
var ebene = "area";

function zeigeAreaNr(ebene_nr){
    verbergen(eval('"' + ebene + i + '"'));
    zeigen(eval('"' + ebene + ebene_nr + '"'));
    i = ebene_nr;
    }

function zeigen(name) {
  if (document.layers) {
    document.layers[''+name].visibility = "show";
    }
  else if (document.all) {
    document.all[''+name].style.visibility = "visible";
    }
  else if (document.getElementById) {
    document.getElementById(''+name).style.visibility="visible";
    }
}

function verbergen(name) {
  if (document.layers) {
    document.layers[''+name].visibility = "hide";
    }
  else if (document.all) {
    document.all[''+name].style.visibility = "hidden";
    }
  else if (document.getElementById) {
    document.getElementById(''+name).style.visibility="hidden";
    }
}