function swapImage(img_name, img_src)
{
   document[img_name].src = img_src;
}

function swapEmenta(id)
{
    
  if (document.getElementById)
  {
    //hide all divs
    for (var i = 1; i < 4 ; i++){
         document.getElementById(i).style.display = 'none';
         document.getElementById("e"+i).className="subHeader";
    }
    //show div
    document.getElementById(id).style.display = 'block';
    document.getElementById("e"+id).className="subHeader1";
  }
  else if (document.all)
  {
    //hide all divs
    for (var i = 1; i < 4 ; i++){
         document.all[i].style.display = 'none';
         document.all["e"+id].className="subHeader";
    }
    //show div
    document.all[id].style.display = 'block';
    documentall["e"+id].className="subHeader1";
  }
  else if (document.layers)
  {
    //hide all divs
    for (var i = 1; i < 4 ; i++){
         document.layers[i].style.display = 'none';
         document.layers["e"+id].className="subHeader";
    }
    //show div
    document.layers[id].style.display = 'block';
    document.layers["e"+id].className="subHeader1";
  }
}