alid values: srcmask, dstmask, nomask,bothmask
<br/>default: dstmask
</pre>
        </div>
    </td>
    <td>char*256(30)</td>
    <td>shr_strdata_nml</td>
  </tr>
  <tr id="mapread_tr">
    <td><a name="mapread"></a>
        <img id="mapread_arrow" src="./images/arrow_right.gif">
        <code class="varname">
          <a href="javascript:void(0)"
             onclick="toggleHelp('mapread')">mapread</a>
        </code>
        <div id="mapread_help" style="display: none;
             padding-left: 16px; m