javascript 休眠的方法

function GetCurrentTimeSeconds()
         {
            // 获取当前时间表示的秒数
             var d=new Date();

            var hour=d.getHours();

             var minute=d.getMinutes();

            var second=d.getSeconds();

           return hour * 60 * 60 + minute * 60 + second;
        }
       
        function WaitTime(sec, timeout)
        {
            // 让程序等待指定的秒数
            // sec:等待秒数
            // timeout:超时秒数
           
            var startPos = GetCurrentTimeSeconds();
           
           var pass;
            while(true)
            {
                pass = GetCurrentTimeSeconds() - startPos;
               
               if (pass >= sec)
                {
                    break;
                }
               
                if ( pass >= timeout)
                {
                   break;
                }
            }
            
         }