循环注册页面事件

        var obj = document.getElementById("main");

        var items = ["click", "keypress"];

        for (var i = 0; i < items.length; i++) {
            (function() {
                var item = items[i];
                obj["on" + item] = function() {
                    alert("Thanks for your " + item);
                };
            })();
        }