function hideElement(elName)
{
        var elName = new getObj(elName);
//       elName.style.display = (elName.style.display == 'block') ? 'block' : 'none';
       elName.style.display = (elName.style.display == 'block') ? 'none' : 'block';
}

function getObj(name)
{
  if (document.getElementById)
  {
        this.obj = document.getElementById(name);
        this.style = document.getElementById(name).style;
  }
  else if (document.all)
  {
        this.obj = document.all[name];
        this.style = document.all[name].style;
  }
  else if (document.layers)
  {
        this.obj = document.layers[name];
        this.style = document.layers[name];
  }
}