var xmlHttp;
function createXMLHttpRequest() {
    if (window.ActiveXObject) {
        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
    } 
    else if (window.XMLHttpRequest) {
        xmlHttp = new XMLHttpRequest();
    }
}
    
function createQueryString() {
    var firstName = document.getElementById("firstName").value;
    var middleName = document.getElementById("middleName").value;
    var birthday = document.getElementById("birthday").value;
    
    var queryString = "firstName=" + firstName + "&middleName=" + middleName
        + "&birthday=" + birthday;
    
    return queryString;
}

function doRequestUsingGET(menu1, menu2) {
    createXMLHttpRequest();
    
    var queryString = "WebTrends.html?menu1=" + menu1 + "&menu2=" + menu2;
    xmlHttp.onreadystatechange = handleStateChange;
    xmlHttp.open("GET", queryString, true);
    xmlHttp.send(true);
}

function handleStateChange() {
    if(xmlHttp.readyState == 4) {
        if(xmlHttp.status == 200) {
            parseResults();
        }
    }
}

function parseResults() {
    var responseDiv = document.getElementById("serverResponse");
    if(responseDiv.hasChildNodes()) {
        responseDiv.removeChild(responseDiv.childNodes[0]);
    }
    var responseText = document.createTextNode(xmlHttp.responseText);
    responseDiv.appendChild(responseText);
}