jquery.shush.js

(function($) {
    $.fn.shush = function($btn) {
        // First, validation

        // Cache global variables
        var $form = $(this);

        // Default $btn to input[type=submit]
        $btn = $btn || 'input[type=submit]';

        if (!($btn instanceof jQuery)) {
            $btn = $form.find($btn);
        }

        // Limit it to 1
        $btn = $btn.eq(0);

        // Get the btn type
        var btnType = $btn[0].nodeName.toLowerCase();
    };
}(jQuery));