js检测页面离开

window.location = 'yjk://app.h5.ihaozhuo.com?page=livetrailer&videoLiveId=' + parseInt(this.Request.id);

var timer = setTimeout(function(){

location.href = 'http://a.app.qq.com/o/simple.jsp?pkgname=com.ihaozhuo.youjiankang&g_f=991653';

}, 1000);

document.addEventListener('visibilitychange', function() {

var tag = document.hidden || document.webkitHidden;

if (tag) {

clearTimeout(timer);

}

})

document.addEventListener('pagehide', function() {

clearTimeout(timer);

})