SharePoint 2010 ECMAScript - How to know logged in user information

This is post which is simple and not really needed. But when I started writing the code in ECMAScript I have faced problems in getting the logged in user information. So, my readers may feel good after see this post and really most the users are looking for this too.
By this time, we have really understood all about ECMAScript Client Object Model and debugging. So, it's easy for us to know it well.
Please find the code below to get the current user information.

<script type="text/javascript">
ExecuteOrDelayUntilScriptLoaded(getWebUserData, "sp.js");
var context = null;
var web = null;
var currentUser = null;
    function getWebUserData() {
        context = new SP.ClientContext.get_current();
        web = context.get_web();
        currentUser = web.get_currentUser();
 currentUser.retrieve();
        context.load(web);
        context.executeQueryAsync(Function.createDelegate(this, this.onSuccessMethod), Function.createDelegate(this, this.onFailureMethod));
    }
    function onSuccessMethod(sender, args) {
        var userObject = web.get_currentUser();
        alert('User name:' + userObject.get_title() + '\n Login Name:' + userObject.get_loginName());
    }
    function onFailureMethod(sender, args) {
        alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
    }
</script>

So, the above code returns you the user object and displays user name and user login name. You can customize it as you want and please let me know the feedback or questions you have.