JavaScript Event KeyCodes.

Press any key to get the JavaScript event keycode

Usage example (press ctrl+z):

   <script>    
    var isCtrl = false;
    $(document).keyup(function (e) {
        if(e.which == 17) isCtrl=false;
        }).keydown(function (e) {
        if(e.which == 17) isCtrl=true;
        if(e.which == 90 && isCtrl == true) {
            $('.js-link-to-save-main-form').trigger('click');
			alert('You pressed STR + Z');
        return false;
        }
    });
</script>