公司页面白色背景有关问题 data_div

公司页面白色背景问题 data_div
<table cellspacing="0" cellpadding="0" border="0" id="table_body">
    <tr>
      <td valign="top"><table cellspacing="0" cellpadding="0" border="0" valign="middle">
             
              <!-- 菜单栏 -->
              <div id="data_div" style="height: 550px">
                <table width="100%" cellspacing="0" cellpadding="0" id="username" validate="{required:true}"></s:textfield>
                      <font style="vertical-align:middle;"></div></td>
                  </tr>
                  <tr>
                    <td name="whguser.realname" id="realname" validate="{required:true}"/>
                      <font style="vertical-align:middle;"></div></td>
                  </tr>
                  <tr>
                    <td name="whguser.idcard" id="idcard" validate="{required:true,datatype:'idcard'}"/>
                      <font style="vertical-align:middle;"></div></td>
                  </tr>
                  <tr>
                    <td name="whguser.mobile" id="mobile" validate="{required:true}"/>
                      <font style="vertical-align:middle;"></div></td>
                  </tr>
                  <tr>
                    <td name="whguser.address" id="address" validate="{required:true}"/>
                      <font style="vertical-align:middle;"></div></td>
                  </tr>
                 
                </table>
                <table width="100%" cellspacing="0" cellpadding="0">
                  <tr>
                    <td align="center" height="40px;"><input type="button" name="okBtn" id="okBtn" onClick="updateWhgUser()" value="确 定" />
                      &nbsp;&nbsp;
                      <input type="button" name="cancelBtn" id="cancelBtn" value="返 回" onClick="history.go(-1)" />
                    </td>
                  </tr>
                </table>
              </div></td>
            <td class="list_border"></td>
          </tr>
        </table></td>
    </tr>
  </table>