统计当前页面访问的duration

visitDuration.js

var pf = window.webkitPerformance ? window.webkitPerformance : window.msPerformance;
pf = (pf ? pf : window.performance);

function sendVisitDuration() {
    var pfTime = pf ? pf.timing.domComplete : nowTime;
    var time = new Date().getTime() - pfTime;
    time = Math.ceil(time / 1000);
    if (time > 0) {
        var category = '0-2s';
        if (time > 2 && time < 5) {
            category = '2-5s';
        } else if (time > 5 && time < 10) {
            category = '5-10s';
        } else if (time > 10 && time < 15) {
            category = '10-15s';
        } else if (time > 15 && time < 30) {
            category = '15-30s';
        } else if (time > 30 && time < 60) {
            category = '30-60s';
        } else if (time > 60 && time < 120) {
            category = '60-120s';
        } else if (time > 120 && time < 300) {
            category = '120-300s';
        } else if (time > 300) {
            category = '>300s';
        }
        
    }
}
//当页面要跳转是触发统计(离开，例如刷新当前页，or点击链接到另外一页)
addEvent(window, "pagehide", sendVisitDuration);