var W3C = document.getElementById? true : false;
var NN4 = document.layers? true : false;
var IE4 = document.all? true : false;
var lnks = 0;
var bvn = 0;

function show(object,lnks,bvn) {

 if (W3C) {
  if (navigator.userAgent.toLowerCase().indexOf('opera')>-1) {
   // there is a bug in at least some Opera-versions. Don't use units as the standard says...
   document.getElementById(object).style.left = lnks;
   document.getElementById(object).style.top = bvn;
  }
  else {
   document.getElementById(object).style.left = lnks + "px";
   document.getElementById(object).style.top = bvn + "px";
  }
  document.getElementById(object).style.visibility = "visible"
 }
 if (IE4) {
  document.all[object].style.pixelLeft = lnks;
  document.all[object].style.pixelTop = bvn;
  document.all[object].style.visibility = "visible";
 }
 else if(NN4) {
  document.layers[object].left = lnks;
  document.layers[object].top = bvn;
  document.layers[object].visibility = "show";
 }
}

function hide(object) {
 if (W3C) {
  document.getElementById(object).style.visibility = "hidden";
 }
 else if (IE4) {
  document.all[object].style.visibility = "hidden";
 }
 else if(NN4) {
  document.layers[object].visibility = "hidden";
 }
}