//AJAX in jQuery
$.get("url hier enzo", function(data) {
    //Wauw, nu staat alles in de data variable.
});


//AJAX in reguliere JavaScript
request.open("GET", "url hier enzo", true);
request.onreadystatechange = function() {
    if(request.readyState == 4 && request.status == 200) {
        //Wauw nu staat alles in de variable request.responseText
    }
}