jquery的进度条问题


function addressAction(){
    $.post(
      'refMat/progress.action',
      function(data){
       $("#pb1").progressBar(data.state.rate);
      },
      'json'          
     );
  }  function up()
  {
  var id=0; 
  var file=$("#upload").val();
if(file==""||file==null)
{
  alert("请选择导入文件!!!");
}else{
id=window.setInterval(addressAction,1000); 
         $("#pb1").progressBar(0); 
   $("#regionDetail").attr("enctype","multipart/form-data");
           $("#regionDetail").ajaxSubmit(
                  {    type:'post',
                       contentType:"application/x-www-form-urlencoded;charset=utf-8",
                       url:'refMat/up.action',
                       success:function(data){
                           alert("上传成功");
                           window.location.reload();
                       }
                  });        
}
  }执行不成功，请问有什么问题吗？