making/ passing form variables

[BEFOR]

How can I define the following "old_houses" within the textfield also as a POST variable? This variable will be checked against before the insert is processed.

<input name="old_houses" type="text" id="name" value="<?php echo ($row_['old_houses']); ?>" size="18" maxlength="18" />

EDITED: 11.27.05

If I can post to a second, but hidden input I belive this will work:

<input name="old_houses" type="text" id="field" value="" size="19" maxlength="20" />

<?php if(isset($_POST['old_houses']))
echo('<input name="assigned_name" type="hidden" id="assigned_name" value=" How to call here?" size="19" maxlength="20" />') ?>

[vaaaska]

I don't know exactly what your variable would be there, but this is an example of how you could call this up...

echo "<input name='assigned_name' type='hidden' id='assigned_name' value='" . $var_here . "' size='19' maxlength'20' />"; ?>