Ajax without jQuery From http://stackoverflow.com/questions/8567114/how-to-make-an-ajax-call-without-jquery

new_gist_file.js

function loadXMLDoc() {
    var xmlhttp;

    if (window.XMLHttpRequest) {
        // code for IE7+, Firefox, Chrome, Opera, Safari
        xmlhttp = new XMLHttpRequest();
    } else {
        // code for IE6, IE5
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }

    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
        }
    }

    xmlhttp.open("GET", "ajax_info.txt", true);
    xmlhttp.send();
}