如何写js判断

  <tr>
            <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">浏览1：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
            <s:file name="upload1" lable="浏览1"></s:file>
          </td>
             <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">说明1：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
          <input type="text" name="memo1" id="memo1"/></td>
          </tr>
    <tr>
            <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">浏览2：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
                <s:file name="upload2" lable="浏览1"></s:file></td>
             <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">说明2：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
          <input type="text" name="memo2" id="memo2"/></td>
          </tr>
            <tr>
            <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">浏览3：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
              <s:file name="upload3" lable="浏览1"></s:file></td>
             <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">说明3：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
          <input type="text" name="memo3" id="memo3"/></td>
          </tr>
            <tr>
            <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">浏览4：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
               <s:file name="upload4" lable="浏览1"></s:file></td>
             <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">说明4：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
          <input type="text" name="memo4" id="memo4"/></td>
          </tr>
            <tr>
            <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">浏览5：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
              <s:file name="upload5" lable="浏览1"></s:file></td>
             <td width="20%" height="30" align="right" bgcolor="#f0f2f3" class="STYLE1">说明5：</td>
            <td width="30%" height="30" bgcolor="#FFFFFF" class="STYLE19">
          <input type="text" name="memo5" id="memo5"/></td>
          </tr>
要求1:浏览和说明必须完整输入一条。
要求2:所有上传格式为图片格式
求写js，不写的就别贴了。