易优eyoucms判断是否有缩略图，无缩略图则不显示

 {eyou:list pagesize="8" titlelen="30" infolen='100'}
          {eyou:eq name='$field.is_litpic' value='1'}
           <!-- 有缩略图 -->
          <div class="msg topic">
            <div class="titleP"> <span class="project_title fl">{$field.typename}</span> <a class="fl txt_color" target="_blank" title="{$field.title}" href="{$field.arcurl}">{$field.title}</a> </div>
            <div class="content clearfix"> <a href="javascript:void(0)" class="img fl"> <img src="{$field.litpic}" alt=""/> </a>
              <p class="txt fr"> {$field.seo_description}...</p>
              <p class="link fr"> <a target="_blank" class="link" href="{$field.arcurl}"> {$field.author} </a> <i class="kuaizhao_line">-</i> <span class="colo-666" style="font-size:12px;">{$field.add_time|MyDate='y-m-d',###}</span> </p>
            </div>
          </div>
           <!-- 有缩略图 end -->
          {eyou:else /}
           <!-- 无缩略图 -->
          <div class="msg discuss">
            <div class="titleP"> <span class="project_title fl">{$field.typename}</span> <a class="fl txt_color" target="_blank" title="{$field.title}" href="{$field.arcurl}">{$field.title} </a> </div>
            <div class="content">
              <p class="txt"> {$field.seo_description}...</p>
              <a target="_blank" class="link" href="{$field.arcurl}"> {$field.author} </a> <i class="kuaizhao_line">-</i> <span class="colo-666" style="font-size:12px;">{$field.add_time|MyDate='y-m-d',###}</span> </div>
          </div>
           <!-- 无缩略图 end -->
          {/eyou:eq}
         {/eyou:list}

栏目列表有缩略图显示带缩略图格式，无缩略图显示文字格式

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