// Rollover code
function setupRollovers() {

  if (!document.getElementsByTagName)

    return;

  var all_links = document.getElementsByTagName('a');

  for (var i = 0; i < all_links.length; i++) {
    var link = all_links[i]; 
    if (link.className &&
        (' ' + link.className + ' ').indexOf(' rollover ') != -1) {
      if (link.childNodes &&
        link.childNodes.length == 1 &&
        link.childNodes[0].nodeName.toLowerCase() == 'img') {
        link.onmouseover = mouseover;
        link.onmouseout = mouseout;
      }
    }
  }
}



function find_target(e)

{

  var target; 

  if (window.event && window.event.srcElement) 
    target = window.event.srcElement;

  else if (e && e.target)
    target = e.target;

  if (!target)
    return null;

  while (target != document.body &&
    target.nodeName.toLowerCase() != 'a')
    target = target.parentNode;
  if (target.nodeName.toLowerCase() != 'a')
    return null;
  return target;
}

function mouseover(e) {

  var target = find_target(e);
  if (!target) return;
  var img_tag = target.childNodes[0];
  img_tag.src = img_tag.src.replace(/(\.[^.]+)$/, '_over$1');
}

function mouseout(e) {

  var target = find_target(e);
  if (!target) return;
  var img_tag = target.childNodes[0];
  img_tag.src = img_tag.src.replace(/_over(\.[^.]+)$/, '$1');
}

window.onload = setupRollovers;