function loadMenu () {
  url="../navmenu.html";
  containerid="menuholder";
  var page_request = false;
  if (window.XMLHttpRequest) // if Mozilla, Safari etc
          page_request = new XMLHttpRequest();
  else if (window.ActiveXObject){ // if IE
       try {
          page_request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
       try {
          page_request = new ActiveXObject("Microsoft.XMLHTTP");
       } catch (e) {}
       }
       } else return false

  page_request.onreadystatechange=function(){
          loadpage(page_request, containerid);
  }

  page_request.open('GET', url, true);
  page_request.send(null);
}

function loadpage(page_request, containerid){
  if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
  {
     document.getElementById(containerid).innerHTML=page_request.responseText;
  }
}