Coding Alternative Error Output 

The method of error output already explained ( default.htm ) is not very user-friendly because the message is displayed so far apart from the actual entry.

The following alternative method exists ( second.htm page):

<tr class="bspTbvCellStd">
<td>between</td>
<td><input type="text" name="time_from"
value="<% page->write( value = time_from ). %>" size="5">
&nbsp;<font color="red"><%= page->messages->assert_message( 'time_from' ) %>
</font></td>

</tr>

In this case, the text belonging to the input field time_from is displayed directly after the input field. The method assert_message returns an error text for a condition (in this case, the attribute name), or an empty string if there is no error message for the condition. You can determine the severity of the error for a condition with assert_severity .