<li?class="item_order?item_qrCode"> ????????<i?class="header_icon?icon_phone"?id="isPcOrMobile"> ????????<a?class="sitenav_mobile"?href="#"?> ????????</a> ????????</i> ????????<div?class="dropdown_panel?qrCode_panel"> ????????????????????<img?src="images/head_qrcode_20160405.png"> ????????????????</div> ????????</li>$(document).ready(function(){ ????$(".item_qrCode").bind('onmouseover',function(){ ????????/*$(".qrCode_panel").css({'display':'block'});*/ ????????$(".qrCode_panel").show(); ????}); })div的display已經設置為none,請問是代碼有問題還是什么其他問題？