// preload images:
// n[i].gif = normal state
// v[i].gif = on mouseover
n1 = new Image();      n1.src = "_img/nav/nav1n.gif";
h1 = new Image();      h1.src = "_img/nav/nav1h.gif";
n2 = new Image();      n2.src = "_img/nav/nav2n.gif";
h2 = new Image();      h2.src = "_img/nav/nav2h.gif";
n3 = new Image();      n3.src = "_img/nav/nav3n.gif";
h3 = new Image();      h3.src = "_img/nav/nav3h.gif";
n4 = new Image();      n4.src = "_img/nav/nav4n.gif";
h4 = new Image();      h4.src = "_img/nav/nav4h.gif";
n5 = new Image();      n5.src = "_img/nav/nav5n.gif";
h5 = new Image();      h5.src = "_img/nav/nav5h.gif";
n6 = new Image();      n6.src = "_img/nav/nav6n.gif";
h6 = new Image();      h6.src = "_img/nav/nav6h.gif";
n7 = new Image();      n7.src = "_img/nav/nav7n.gif";
h7 = new Image();      h7.src = "_img/nav/nav7h.gif";
n8 = new Image();      n8.src = "_img/nav/nav8n.gif";
h8 = new Image();      h8.src = "_img/nav/nav8h.gif";

var Bildname,Bildobjekt;

// change images on mouseover
function ImgSwap(Bildname,Bildobjekt)
{
   if (document.images)
   {
      var a = document[Bildname].name;
      document[a].src = Bildobjekt.src;
   }
}


// Popup menue
function showDiv(divId) {
   
   if (document.getElementById){
      if ( divId != "" ) {	    
      document.getElementById(divId).style.visibility = "visible";
       }
   }
   
}

function hideDiv(divId) {
   if (document.getElementById){
   
      if ( divId != "" ) {	
      document.getElementById(divId).style.visibility = "hidden";
       }
   }
}