function findElement(id)
{
  if (document.getElementById)
  {
    obj = document.getElementById(id);
  }
  else if (document.layers)
  {
    obj = document.layers[id];
  }
  else if (document.all)
  {
    obj = document.all[id];
  }
  return obj;
}

function visBillede(billede)
{
  var re = new RegExp ('.lille', 'gi') ;
  var storImg = billede.src.replace(re, '') ;
  document.images["storImg"].src = storImg;
  findElement("storDiv").style.visibility = "visible";
  findElement("storDiv").style.top = findElement("html").scrollTop;
  findElement("storDiv").style.left = 0;
  findElement("storTekst").innerText = billede.alt;
}