js离开页面刷新或关闭

$(document).ready(function(){
    //监听页面退出
    window.onbeforeunload = function (e) {
        //do something
        $.ajax({
            url:'http://www.zefey.com/blog',
            method:'get',
            async:false,
            success:function(data){
                console.log('data',data);
            },
            error:function(err){
                console.log('err',err);
            },
            complete:function(XMLHttpRequest, textStatus){
                console.log('complete');
            }
        })

        // 兼容IE8和Firefox 4之前的版本
        e = e || window.event;

        if (e) {
            e.returnValue = '关闭提示';
        }

        // Chrome, Safari, Firefox 4+, Opera 12+ , IE 9+
        return '关闭提示';
    };

});