SP2010 javascript

/* Currently, only IE respects the context.local(currentUser, EffectiveBasePermissions) command. */

function SPAccesor() {
    SPAccesor.OnListItemTitlesRetrieved;

    /* Returns an array of strings that represent the values of the columnName in listName */
    this.getListItemTitles = function (listName) {
        var context = new SP.ClientContext.get_current();
        var web = context.get_web();
        var currentUser = web.get_currentUser();
        var oList;
        var listItemColl;

        context.load(currentUser);
        context.load(web, 'EffectiveBasePermissions');
        context.executeQueryAsync(Function.createDelegate(this, loadUserIntoContext), Function.createDelegate(this, displayFailure));

        //load the current spweb
        oList = context.get_web().get_lists().getByTitle(listName);

        //load the list items into local context
        listItemColl = oList.getItems(' ');

        context.load(listItemColl);
        context.executeQueryAsync(Function.createDelegate(this, iterateListItemTitles), Function.createDelegate(this, displayFailure));
    }

    function loadUserIntoContext(sender, args) {
        document.getElementById("s4-workspace").style.color = "blue";
        //Event handling opportunity
    }

    function displayFailure(sender, args) {
        document.getElementById("s4-workspace").style.color = "red";
        console.log('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
    }

    function iterateListItemTitles(sender, args) {
        var oListItem;
        var listItemEnumerator = listItemColl.getEnumerator();
        var item;
        var text = [];

        while (listItemEnumerator.moveNext()) {
            item = listItemEnumerator.get_current();
            text.push(item.get_item("Title"));
        }

        SPAccesor.OnListItemTitlesRetrieved(text);
    }
}

function logger(text) {
    for (var i = 0; i < text.length; i++)
        console.log(text[i]);
}

function runScript() {
    SPAccesor.OnListItemTitlesRetrieved = logger;
    var spAccessor = new SPAccesor();
    spAccessor.getListItemTitles("Alerts");
}

ExecuteOrDelayUntilScriptLoaded(runScript, "sp.js");