【原创】jquery判断滚动条置底插件

//滚动条滚动到底部了  --by xqs
(function ($) {
    $.fn.scrollBot = function (opt, callback) {
        //diffY:距离底部像素值
        var opts = (arguments.length == 1) ? {diffY: 0} : $.extend({diffY: 0}, opt);
        var fun = (arguments.length == 1) ? arguments[0] :arguments[1];
        return this.each(function () {
            var _this = $(this);
            _this.bind("scroll", function () {
                var scrollTop = _this.scrollTop();
                var clientH = _this.height();
                var contentH = 0;
                $.each(_this.children(":visible"), function () {
                    contentH += $(this).outerHeight(true);
                });
                if (scrollTop + clientH + opts.diffY >= contentH) {
                    fun.apply(this,arguments);
                }
            })
        });
    };
})(jQuery);

$("#content").scrollBot({"diffY":100},function(){
            //diffY:距离底部像素值
            //console.log("滚动条到底了···")
        }
    );