Javascript issues when creating an item.

I'm trying to get some JavaScript working to create an Task Item based on some other events on a page. I'm just learning but I've got the majority of what I want down. (I think.)

What I don't understand is why my task will create in one scenario and not in another.

function MarkAsRead() {
    console.log('MarkAsRead Function Ran');
    var ctxT = GetCurrentCtx();
    if (ctxT.listName = 'Documents') {
        //Get Context
        clientContext = new SP.ClientContext.get_current();
        //Get Web
        this.web = clientContext.get_web();
        //Get Current User
        currentUser = web.get_currentUser();
        clientContext.load(currentUser);
        //Get Selected Items
        items = SP.ListOperation.Selection.getSelectedItems(clientContext);

        //get workflow task list
        oList = clientContext.get_web().get_lists().getByTitle('Workflow Tasks');
        itemCreateInfo = new SP.ListItemCreationInformation();
        this.oListItem = oList.addItem(itemCreateInfo);
        //oListItem.set_item('ContentType', 'Mark As Read');
        oListItem.set_item('Title', 'Read Notification: Javascript');
        //oListItem.set_item('Body', 'Hello World!');
        oListItem.update();
        //clientContext.load(oListItem);

        //OnSuccess....
        clientContext.executeQueryAsync(Function.createDelegate(this, this.onQuerySucceeded), Function.createDelegate(this, this.onQueryFailed));
    };

};

function onQuerySucceeded(sender, args) {
    console.log('Query Succeeded');
    console.log(currentUser.get_loginName());
    for (i in items) {
                console.log(items[i].id);
    }
}

function onQueryFailed(sender, args) {
    alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
}

If I do the "//get workflow task list" where it is it creates the task.  I'd prefer it create the task in the onQuerySucceeded function.  When I put the code there it fails.  What am I doing wrong?

I'm like to get all the arguments and on success create the task using those arguments in the task.

Thanks for the help in advance.

David Jenkins