内容页会员组图标

内容页怎么获取会员组图标

{php $userinfo = get_memberinfo($userid, true);}

                     {if !$issystem}

<a href="{U('member/myhome/init', array('userid'=>$userid))}" target="_blank" title="{$nickname}" class="userlink"><img src="{get_memberavatar($userid)}" alt="{$nickname}" class="useravatar"></a>

{/if}

<span class="username">{$nickname}</span>

<span class="usergroup">{get_groupname($userinfo['groupid'])}<img src="这里是会员组图标" height="18"></span>

应该如何获取会员组图标呢?