function showSubMenu(){
   document.getElementById('expertiseMenu').style.display = '';
}
function hideSubMenu(){
   document.getElementById('expertiseMenu').style.display = 'none';
}
function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();
var identity;
function sendRequestToLoadExpertiseMenu(action, id) {
	identity = id;
    http.open('GET', action, true);
    http.onreadystatechange = handleResponseToLoadExpertiseMenu;
    http.send(null);
}

function handleResponseToLoadExpertiseMenu() {
    if(http.readyState == 4){
        var response = http.responseText;
            document.getElementById(identity).innerHTML = response;
    }
}