<input type="hidden" id="order_id" value="<">
<script type="text/javascript">
function pay_status(){
  var order_id = $("#order_id").val();
  $.ajax({ 
  url:'http://' + window.location.host+ '/home/cart/pay_status_check',
  dataType:'json', 
  type:'post', 
  data:{'order_id':order_id}, 
  success:function(data){ 
   if(data == '1' ){
    window.clearInterval(int); //销毁定时器
    setTimeout(function(){
     //跳转到结果页面，并传递状态
     window.location.href="http://" rel="external nofollow" rel="external nofollow" +window.location.host+"/home/cart/pay_result";
    },1000)
    
   }else if(data =='2'){
    window.clearInterval(int); //销毁定时器
    setTimeout(function(){
     //跳转到结果页面，并传递状态
     window.location.href="http://" rel="external nofollow" rel="external nofollow" +window.location.host+"/home/cart/pay_result";
    },1000)
   }
  }, 
  error:function(){ 
   alert("error");
   
  }, 

 });
}
//启动定时器
var int=self.setInterval(function(){pay_status()},1000);
</script>

//支付状态检测
 public function pay_status_check(){
  $order_id = I("order_id");
  $result = M('table')->where("order_id = $order_id")->find();
  echo $result['pay_status'];
 }