/* Obtient un objet XmlHttpRequest (AJAX)
 */
function getXhr() {

  var xhr = null;

  if (window.XMLHttpRequest) { 
  
    xhr = new XMLHttpRequest();
  }
  else if (window.ActiveXObject) {

      try {
        xhr = new ActiveXObject("Msxml2.XMLHTTP");
      }
      catch (e) {
      
        try {
            xhr = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e) {}
      }
  }

	return xhr;
}


/* Ajoute une classe sfhover pour les éléments li du menu (IE ne comprend pas :hover en css ;)
 */
var sfHover = function() {

  var sfEls = document.getElementById("menu").getElementsByTagName("li");

  for (var i=0; i < sfEls.length; i++) {
	
    sfEls[i].onmouseover = function() {
      
      this.className += " sfhover";
    }

    sfEls[i].onmouseout=function() {

      this.className = this.className.replace(new RegExp(" sfhover\\b"), "");
    }
  }
}

if (window.attachEvent) window.attachEvent("onload", sfHover);