/*标题栏弹窗*/    $("#menu_div").click(function (e) {        $(".dltc").toggle();        e.stopPropagation();//停止冒泡    });    $(document).click(function (e) {        var e = e || window.Event;        var elem = e.target || e.srcElement;        while (elem) {            if (elem.className && elem.className.indexOf("dltc") > -1) {//查询父类                return;            }            elem = elem.parentNode;        }        $(".dltc").hide();    });