html tr td colspan

colspan  属性规定单元格可横跨的列数，

第一行的colspan规定其一行所跨越的列数，要与下一行的<td></td>个数一致

 if(!empty ($alarmDescArr))
 {
    echo '<table width="80%" border="0" cellspacing="0" class="tableNormal" id=THAlarmCfgid >
      <tr bgcolor="#0099FF">
        <td class="tableTitleL1" colspan="10"><font color="#FFFFFF">告警描述与条件</font></td>
      </tr>
      <tr>

        <td nowrap class="tableSingularLine">告警描述使能</td>
        <td nowrap class="tableSingularLine">告警描述</td>
        <td nowrap class="tableSingularLine">告警级别</td>

        <td nowrap class="tableSingularLine">告警描述延迟时间</td>
        <td nowrap class="tableSingularLine">告警运行参数</td>
        <td nowrap class="tableSingularLine">告警运行参数判断条件</td>
        <td nowrap class="tableSingularLine">告警条件条件值A</td>
        <td nowrap class="tableSingularLine">告警条件条件值B</td>
        <td nowrap class="tableSingularLine">添加告警条件</td>
        <td nowrap class="tableSingularLine">删除告警条件</td>
      </tr>
        ';
  }  

            for($i=0;$i<count($alarmDescArr); $i++)
            {
                if ($i%2)
                {
                    $szClass = "tableEvenLine";
                }
                else
                {
                    $szClass = "tableSingularLine";
                }
                echo("<tr id=alarmDefine ".$i." >");

                // disabled  delete alarm
                 if($alarmDescArr[$i]['wd_encblelog'] == 1)
                   $alarmDescEnalbe = "checked";
                 else
                   $alarmDescEnalbe = "";

                // echo $alarmDescArr[$i]['wd_encblelog'];

                // 告警描述使能
                echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wd_encblelog] type=checkbox class=textEnaSty value=1 ".$alarmDescEnalbe." size=10
                       maxlength=10 disabled></td>");

                //  传递wd_id 与 wd_priority
                // echo("<input name=alarmDescArr[".$i."][wd_id] type=\"hidden\" class=textEnaSty value=\"".$alarmDescArr[$i]['wd_id']."\" >");
                // echo("<input name=alarmDescArr[".$i."][wd_priority] type=\"hidden\" class=textEnaSty value=\"".$alarmDescArr[$i]['wd_priority']."\" >");

                // 告警描述
                echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wd_warndesc] type=text class=textEnaSty value=\"".$alarmDescArr[$i]['wd_warndesc']."\" size=15
                        maxlength=10 disabled></td>");

                // 告警级别
                echo("<td nowrap class=".$szClass.">
                       <select name=alarmDescArr[".$i."][wd_level] size=1 class=textEnaSty>
                        <option value=". $alarmDescArr[$i]['wd_level'] ." selected disabled>".$alarmLev[$alarmDescArr[$i]['wd_level']]."</option>
                       </select>
                      </td>");

                //告警描述延迟时间          通过OpenNewWindow
                 echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wd_delay] type=text class=textEnaSty value=\"".$alarmDescArr[$i]['wd_delay']."\" size=10
                        maxlength=10 disabled></td>");

                // 运行参数
                 echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wc_parameters] type=text class=textEnaSty value=\"".$alarmDescArr[$i]['wc_parameters']."\" size=10
                        maxlength=10 disabled></td>");

                 // 判断条件
                  echo("<td nowrap class=".$szClass.">
                       <select name=alarmDescArr[".$i."][wc_conditions] size=1 class=textEnaSty>
                        <option value=". $alarmDescArr[$i]['wc_conditions'] ." selected disabled>".$alarmJdgCon[$alarmDescArr[$i]['wc_conditions']]."</option>
                       </select>
                      </td>");

               // 条件值A
                echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wc_value0] type=text class=textEnaSty value=\"".$alarmDescArr[$i]['wc_value0']."\" size=10
                        maxlength=10 disabled></td>");

              // 条件值B
              echo("<td nowrap class=".$szClass.">
                       <input name=alarmDescArr[".$i."][wc_value1] type=text class=textEnaSty value=\"".$alarmDescArr[$i]['wc_value1']."\" size=10
                        maxlength=10 disabled></td>");

              // 添加告警条件
            echo("<td nowrap class=".$szClass.">
                     <input name=alarmDefine[".$i."]['alarm_delete'] type=button class=inputButtonNormal
                        value='添加' onClick='OpenNewWindow(".$alarmDescArr[$i]['wd_id'].",".$alarmDescArr[$i]['wd_priority'].",".$device_type_id.")' size=50></td>");

              // 删除告警描述及相关的告警条件
            echo("<td nowrap class=".$szClass.">
                     <input name=alarmDefine[".$i."][con_add] type=button class=inputButtonNormal
                       value='删除'  onClick='alarmDelete(".$alarmDescArr[$i]['wd_id'].",".$alarmDescArr[$i]['wd_priority'].",".$device_type_id.",\"".$alarmDescArr[$i]['wc_parameters']."\")'></td>");

              echo("</tr>");

            }

if(!empty ($alarmDescArr))
 {

      echo "</table>";

      echo "<p></p>";
  }

效果如下：