js 监控浏览器关闭(完美兼容chrome & ie & fire fox)（转）

转自：http://blog.youkuaiyun.com/outlook008/article/details/8763035

 

var UnloadConfirm = {};

UnloadConfirm.MSG_UNLOAD = "数据尚未保存，离开后可能会导致数据丢失\n\n您确定要离开吗？";

UnloadConfirm.set = function(a) {

    window.onbeforeunload = function(b) {

        b = b || window.event;

        b.returnValue = a;

        return a

    }

};

UnloadConfirm.clear = function() {

    fckDraft.delDraftById();

    window.onbeforeunload = function() {

    }

};

UnloadConfirm.set(UnloadConfirm.MSG_UNLOAD);