如何将Input标签放入img标签中？

<label for="buy_qqpay">
                                <img src="http://www.liuan.mobi/assets/icon/qqpay.ico" width="16px" height="16px"> QQ钱包
                            </label>
                            <input id="buy_qqpay" class="pay_detail"  onclick="setType(2)"/>

.pay_detail {
  padding: 5px 10px;
  display: none;
}