unbind customizing

$.fn.unbind = function(event) {
    var cls = $(this).attr("class");
    if ( cls != undefined && event == "click" && cls.indexOf("btn-success") > -1 ) {
        var e = $._data($(this).get(0), "events");
        if ( e != undefined && e.click[0].handler.toString().indexOf("refClickHandler") < 0 ) $(this).off(event);
    } else {
        $(this).off(event);
    }
}

$(".btn-success").unbind("click");
$(".btn-success").bind("click", refClickHandler);