CTRL + key detection in JavaScript

ctrl-key-detection.js

/* This may not work with default browser shortcuts. Need to give it a try though. */

/* Create function */
$.ctrl = function(key, callback, args) {
    $(document).keydown(function(e) {
        if(!args) args=[]; // IE barks when args is null 
        if(e.keyCode == key.charCodeAt(0) && e.ctrlKey) {
            callback.apply(this, args);
            return false;
        }
    });        
};

/* Use function */
$.ctrl('S', function() {
    alert("Saved");
});