How do I populate one listbox from another listbox using JavaScript?
<p>Can anyone tell me how to populate one listbox from another listbox item using JavaScript or ASP.NET 2.0?</p>

<blockquote>
  <h3>Duplicate</h3>
  
  <p><a href="http://stackoverflow.com/questions/204140/how-to-add-move-one-list-box-items-to-another-listbox-items-in-javascript">How would I move one list box items to another listbox items in JavaScript?</a></p>
</blockquote>

<p>For ex--My 1st listbox is Region then accourding to region selection the second listbox country will be display and accourding to country seletion state listbox will display all will come from database depends on Region Id or Country id n all</p>
