var arr = [1000, 3000, 500];function next() {    var d = jQuery.Deferred(),        i = 0,        doNext = function () {            if (i < arr.length) {            	console.log(arr[i] + "-------------" + arr[i] * Math.random());            	i++;                setTimeout(doNext, arr[i]);            } else {                d.resolve();            }        };    setTimeout(doNext, arr[i]);    return d.promise();}next().then(function(){	console.log("OK! its finish.");});