jquery记录页面访问停留时间

function visit_timing()

{

var start;

var end;

var duration = 0;

start = new Date();

$(window).bind('beforeunload', function(e) {

end = new Date();//用户退出时间

duration = end.getTime() - start.getTime();

duration = duration/1000;//取的是秒

$.ajax({

type: 'POST',

async: false,//这块至关重要，用$post默认是true

url: 'url',

data: {a:1.vid,b:duration}

});

});

}