var objref1;
var objref2;
var objref3;
var objref4;
var aktiv='';
var aktivID=0;

function lieslinks(n) {
   eval("var obj = objref" + n);
   if (document.all) {
      return obj.posLeft;
   } else if (document.getElementById) {
      return parseInt(obj.left);
   }
}
function setzelinks(n, wert) {
   eval("var obj = objref" + n);
   if (document.all) {
      obj.posLeft = wert;
   } else if (document.getElementById) {
      obj.left = wert;
   }
}
function liesoben(n) {
   eval("var obj = objref" + n);
   if (document.all) {
      return obj.posTop;
   } else if (document.getElementById) {
      return obj.top;
   }
}
function setzeoben(n, wert){
   eval("var obj = objref" + n);
   if (document.all) {
      obj.posTop = wert;
   } else if (document.getElementById) {
      obj.top = wert;
   }
}

function init() {
   if (document.getElementById) {
      objref1 =
         document.getElementById("register1").style;
      objref2 =
         document.getElementById("register2").style;
      objref3 =
         document.getElementById("register3").style;
      objref4 =
         document.getElementById("register4").style;

	//aktiv='txt_31zs';
        // var newElement=document.getElementById(aktiv);
        // newElement.className='aktiv';

   }


   var layer_x = lieslinks(1);
   var layer_y = liesoben(1);
   setzelinks(2, layer_x);
   setzeoben(2, layer_y);
   objref2.visibility = "hidden";
   setzelinks(3, layer_x);
   setzeoben(3, layer_y);
   objref3.visibility = "hidden";
   setzelinks(4, layer_x);
   setzeoben(4, layer_y);
   objref4.visibility = "hidden";
   
   
   if (aktiv) {
   	register(aktivID, aktiv);
   }
}
function register(n, link_id) {
if (aktiv) {
var oldElement=document.getElementById(aktiv);
oldElement.className='';
}
aktiv=link_id;
var newElement=document.getElementById(aktiv);
newElement.className='aktiv';


   for (var i=1; i<=4; i++) {
      var visi = (i==n) ? "visible" : "hidden";
      eval("var obj = objref" + i);
      obj.visibility = visi;
   }
}