autocomplete with params

autocomplete with params

Hello!

I have a script that works with  autocomplete. 
But I need to add another parameter to  myurl  when selecting from the dropdown menu.
Can anyone help?
  2. <from>
  3. <select name="country" id="country" class="btn-country-select">
  4. <option value="0"></option>
  5. <option value="1" >Austria</option>
  6. <option value="2" >Zambia</option>
  7. </select>
  8. <input type="text" name="searchStr" id="searchStr">
  9. </form>
  10.             
  11. $().ready(function() {
  12. $("#searchStr").autocomplete("myurl", {
  13. width: 218,
  14. matchContains: true,
  15. selectFirst: false
  16. });
  17. });