倒计时结束时不再请求

项目中倒计时问题的整理js代码如下 修复在ios中版本不兼容的问题

function getLeftTimerData(enddate){
	
  var timer_data = {}; 
  //var leftTime = (new Date(enddate)) - new Date(); //计算剩余的毫秒数
    var leftTime = (new Date(enddate.replace(/-/g, "/"))) - new Date(); //计算剩余的毫秒数 //解决new date在ios中不兼容的问题
  
  var hours = parseInt(leftTime / 1000 / 60 / 60, 10); //计算总小时
  var minutes = parseInt(leftTime / 1000 / 60 % 60, 10);//计算剩余的分钟
  var seconds = parseInt(leftTime / 1000 % 60, 10);//计算剩余的秒数

  
  if (hours >= 0 || minutes >= 0 || seconds >= 0){
    timer_data.hours = hours;
    timer_data.minutes = minutes;
    timer_data.seconds = seconds;
  }
	
if(seconds<=0 && minutes<=0 && hours<=0 && hours<=0){
    timer_data.hours = "00";
    timer_data.minutes =  "00";
    timer_data.seconds =  "00";
    clearInterval(timer);
															
}
	 
  return timer_data;
}

//调用方式

timer=setInterval(function () {
            timer_data = getLeftTimerData(end_time_str);
            $(item).find(".countdown-main .hours").html(timer_data.hours);
            $(item).find(".countdown-main .min").html(timer_data.minutes);
            $(item).find(".countdown-main .sec").html(timer_data.seconds);
}, 1000);