JS sleep方法

function sleep(milisecond) {

        var currentDate, beginDate = new Date();

        var beginHour, beginMinute, beginSecond, beginMs;

        var hourGaps, minuteGaps, secondGaps, msGaps, gaps;

        beginHour = beginDate.getHours();

        beginMinute = beginDate.getMinutes();

        beginSecond = beginDate.getSeconds();

        beginMs = beginDate.getMilliseconds();

        do {

            currentDate = new Date();

            hourGaps = currentDate.getHours() - beginHour;

            minuteGaps = currentDate.getMinutes() - beginMinute;

            secondGaps = currentDate.getSeconds() - beginSecond;

            msGaps = currentDate.getMilliseconds() - beginMs;

            if (hourGaps < 0) hourGaps += 24;   //考虑进时进分进秒的特殊情况 

            gaps = hourGaps * 3600 + minuteGaps * 60 + secondGaps;

            gaps = gaps * 1000 + msGaps;

        } while (gaps < milisecond);

    }