How can i get HTML items in combobox

1. 
   

   how can i input item1~item100 in combobox1

   
   


2. 
   

   how can i select item1 using combobox

   
   

<div id="game" class="area">
  <ul>
    <li data-game="_12345" class="choic gid_12345">item1</li>
    <li data-game="_12312" class="choic gid_12312">item2</li>
    <li data-game="_12384" class="choic gid_12384">item3</li>
  </ul>
</div>