Kidum I know everything

function learnAll() {
    var VOC_URL = "/Students/Voc/";
    var wordsXmlToArray = function (wordsXml) {
            var retArr = [];
            var xml = wordsXml;
            $(xml).find('words word').each(function (i, v) {
                retArr[i] = {
                    id: $(v).attr('id'),
                    word: $(v).attr('word'),
                    rank: $(v).attr('rank') == "" ? "0" : $(v).attr('rank'),
                    img: $(v).attr('img'),
                    sound: $(v).attr('sound')
                };
            });
            return retArr;
        };
    var rateKnow = function(wordId) {
        $.ajax({
            type: "GET",
            url: VOC_URL + "Input/UserWordRank.aspx?WordId=" + wordId + "&Rank=" + 2 + "&Rnd=" + Math.floor((Math.random() * 100000000) + 1),
            dataType: "xml"
        });
    }
    $.ajax({
        type: "GET",
        url: VOC_URL + 'Output/LearningWords.aspx?Mode=Initial&Rnd=' + Math.floor((Math.random() * 100000000) + 1) + "&UnitId=" +$.urlParam("UnitId"),
        dataType: "xml",
        success:function(xml) {
            wordsXmlToArray(xml).forEach(function(element) {
                rateKnow(element.id);
            });
        }
    });
}
learnAll();