Html 使用xpath选择标记后的第一个标记

我的HTML如下所示：

<root>
 <Customer cid= "C1" name="Janine" city="Issaquah">
  <input name="Client.ClaimsAdjudicationPendReason" />
  <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudicationPendReason','','')>
            <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif"/>


<input name="Client.ClaimsAdjudication" />
    <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudication','','')>
            <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif"/>

  </Customer>  
</root>

但是我需要选择标签下面的img节点，其中

name="Client.ClaimsAdjudicationPendReason"

---

原始html缺少了一些内容，请参见我上面的评论。所以假设这就是我们的意图：

<root>
    <Customer cid="C1" name="Janine" city="Issaquah">
        <input name="Client.ClaimsAdjudicationPendReason" />
        <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudicationPendReason','','')" />
        <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif" />
        <input name="Client.ClaimsAdjudication" />
        <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudication','','')" />
        <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif" />
    </Customer>
</root>

html无效，标记未关闭，并且它们的onclick属性没有右引号。

<root>
    <Customer cid="C1" name="Janine" city="Issaquah">
        <input name="Client.ClaimsAdjudicationPendReason" />
        <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudicationPendReason','','')" />
        <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif" />
        <input name="Client.ClaimsAdjudication" />
        <a onclick="javascript:pendReasonLookup('MFM_Pend Reason', 'PendReason','txtClaimsAdjudication','','')" />
        <img title="Lookup" class="imgSearchIcon" alt="Lookup" src="/F005web/images/search.gif" />
    </Customer>
</root>

//input[@name="Client.ClaimsAdjudicationPendReason"]/following-sibling::img[1]