JS随机调用指定函数的方法

function randRange(data) {    var newTime = data[Math.floor(data.length * Math.random())];    return newTime;}function toggleSomething() {    var timeArray = new Array(200, 300, 150, 250, 2000, 3000, 1000, 1500);    // do stuff, happens to use jQuery here (nothing else does)    $("#box").toggleClass("visible");    clearInterval(timer);    timer = setInterval(toggleSomething, randRange(timeArray));}var timer = setInterval(toggleSomething, 1000);// 1000 = Initial timer when the page is first loaded