Windows App Error: Object doesn't support property or method 'validate'

I'm developing a Windows 8.1 App in Javascript and HTML5. While running it in the emulator I am getting the following error:

0x800a01b6 - JavaScript runtime error: Object doesn't support property or method 'validate'.

It is highlighting to the below line of code:

jQuery(function($) {
    $("#CommentForm").validate({
        submitHandler: function(form) {
            return false;
        }
    });
});

Will be great if some one can help me out. Thanks!