I have a dropdown with following elements

 

<select  title='Location'>

      <option ></option>

      <option> AAA</option>

      <option> BBB</option>

      <option> CCC</option>

</select>

 

I want that once i select one element (AAA) from the dropdown and click on a button...it should set the selected element to none...so that i can make my second selection from the dropdown..

 

Thanks in advance :)