Best cross-browser method to capture CTRL+S with JQuery?

$(window).keypress(function(event) {
    if (!(event.which == 115 && event.ctrlKey) && !(event.which == 19)) return true;
    alert("Ctrl-S pressed");
    event.preventDefault();
    return false;
});

shortcut.add("Ctrl+S",function() {
    alert("Hi there!");
});

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