JS实现点击下拉菜单把选择的内容同步到input输入框内的实例

<div class="input-group-btn">
  <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
    项目名称
    <span class="caret"></span>
   </button>
   <ul id="project" class="dropdown-menu">
    <li value="account"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" >account</a></li>
    <li class="divider"></li>
    <li value="drive"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" >drive</a></li>
    <li class="divider"></li>
    <li value="qing"><a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" >qing</a></li>
   </ul>
  </div>

$("#project").on("click", "li", function(){
 $("#proname").val($(this).text());
});