点击文字上的ajax标签

I want to display the content of a label in a text fieldwith onClick event how can I do it, Is there any specific method to do it or is there any other way.

Please help I am new to ajax.

Thanks

NO need of ajax for this you can do this by using jquery instead simply

In html:

  <input type="text" name="txt1" value="" id="txt"/>
  <label for="checking" id="label">checking</label>
  <input type="submit" name="submit" value="Click" id="butt" />

In Javascript:

  $("#butt").click(function(){
     var lab_val = $("#label").text();
     document.getElementByID("txt").value =lab_val;
     // or $("#txt").val(lab_val);
   });