GLI_initializeNavigation = function()
{
  if (document.all && document.getElementByClassName) {
    navRoot = document.getElementByClassName("navigation");
    for (var i=0; i<navRoot.childNodes.length; i++) {
      node = navRoot.childNodes[i];
      if (node.nodeName=="LI") {
        node.onmouseover = function() {
          this.className += " over";
        }
        node.onmouseout = function() {
          this.className=this.className.replace(" over", "");
        }
      }
    }
  }
}
window.onload = GLI_initializeNavigation;