ajax异步请求刷新

$(document).ready(function () {
  testchaxun();
   setInterval("testchaxun()",5000);
  });
  function testchaxun(){
    /* var selectId = $('#proviace').val(); */
    $.ajax({
    type : "POST",
     /* cache: false, */
    url : "WarningAction!warningdefQuery1.action",
    dataType : "json",
    success : function(data) {
      $('tr').remove('.datatr');
      for(var i=0;i<data.length;i++){
        if(data[i].pState == '危险'){
          $('.table-thtr').after('<tr class="datatr error-tr">'+
           '<td><img class="picture" src="'+data[i].pPic+'"/></td>'+
           '<td>'+data[i].pName+'</td>'+
           '<td>'+data[i].uName+'</td>'+
           '<td>'+data[i].bHomenum+'</td>'+
           '<td>'+data[i].bNumber+'</td>'+
           '<td>'+data[i].eStart+'</td>'+
           '<td>'+data[i].wType+'</td>'+
           '<td>'+data[i].wTime+'</td>'+
           '<td>'+data[i].pAddress+'</td>'+
           '<td>'+data[i].uName+'</td>'+
           '<td>'+data[i].pState+'</td>'+
           '<td><a href="WarningAction!waringInfor.action?WId='+data[i].wId +'">详情</a></td>'+
           '</tr>');
        }else{
          $('.table-thtr').after('<tr class="datatr">'+
         '<td><img class="picture" src="'+data[i].pPic+'"/></td>'+
         '<td>'+data[i].pName+'</td>'+
         '<td>'+data[i].uName+'</td>'+
         '<td>'+data[i].bHomenum+'</td>'+
         '<td>'+data[i].bNumber+'</td>'+
         '<td>'+data[i].eStart+'</td>'+
         '<td>'+data[i].wType+'</td>'+
         '<td>'+data[i].wTime+'</td>'+
         '<td>'+data[i].pAddress+'</td>'+
         '<td>'+data[i].uName+'</td>'+
         '<td>'+data[i].pState+'</td>'+
         '<td><a href="WarningAction!waringInfor.action?WId='+data[i].wId+'">详情</a></td>'+
         '</tr>');
        }

       }
     }
    });
   };
</script>

public String waringInfor(){
     w= warningService.getWarningByWid(WId);
     if (w!=null) {
       if (w.getPId()!=null) {
       p =patientService.getPatientByPId(w.getPId());
      }
    }
    if (p!=null) {
      if (p.getPId()!=null) {
        s= sickroomService.getSickroomByPid(p.getPId());
      }
      if (p.getPEquipmentid()!=null) {
        e= equipmentService.getEquipmentByEId(p.getPEquipmentid()); 
      }
    }
    return "waringInfor";

  };