jquery获取当前select下拉选的属性值

               <li>
                   <select id="select_phone"></select>
                   <input type="button" id="huoqu" value="huoqu"/>
               </li>

                $("#huoqu").click(function(){
                    var text = $("#select_phone")[0].options[$("#select_phone")[0].selectedIndex].text;
                    alert(text);
                });