问在html表中上载前无法预览图像

EN

function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();
            
            reader.onload = function (e) {
                $('#blah').attr('src', e.target.result);
            }
            
            reader.readAsDataURL(input.files[0]);
        }
    }
      $(function(){
   $("#imgInp").change(function(){
        readURL(this);
    });
        $("#add_field").click(function () {
          $("#table_container").append($("#temp_div").html());
        });
      })

.image-upload > input
{
    display: none;
}

.image-upload img
{
    width: 50px;
    cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<form action="" method="POST" enctype="multipart/form-data"> 
  <table id="table_container">
                <tr>
                    <th><label class="lbl-header">My Hobies</label></th>
                    <th><label class="lbl-header">Image</label></th>
                </tr>
                <tr>
                  <td><input type="text" name="hobies[]" value=""></td>
                  <td>
                    <div class="image-upload">
                          <label for="file-input">
                              <img src="upload.jpg"/>
                          </label>
                          <input id="file-input" id="imgInp"  type="file" name="image[]" />
                          <img src="#" alt="image" id="blah">
                    </div>
                  </td>
                </tr>
               </table>
                 
                <input type="submit" name="submit" value="Submit">
</form>