Lack of javascript understanding

[venerable bede]

Hi All

I have just started my first asp.net application in years and have to go through the relearning process after years doing windows work.

I am really struggling with javascript in particular.

Can anyone give me a brief description of the following code:

$(function () {
        $("input:submit").button();
        $("input:button").button();
    });

I am so unfamiliar with this syntax. What is the $ for?

Also, can anyone suggest a good site for javascript?

Thanks In Advance