Limiting Selection on Form

[msmysql]

I have checkboxes on a form that should only allow up to four selections.

What would I need to add to this code to limit the selection to 4. Now it lets you select more than 4.

<td class="resultsColumnName" id="vciColumnTitle" valign="bottom" align="center"><strong>VCI</strong><br>Cushion</td>
		<td class="resultsColumnName" id="checkboxColumnTitle" valign="bottom" align="center"><strong><h2>Choose up<br> to 4 Shoes to<br> Compare</h2></strong></td>
	</tr>	
	<?
do { ?>
  		<tr>
			<td class="shoeNameResults"><?=$myrow[product_name];?></td>
			<td class="shoeTciResults" align="center" width="30"><?=$myrow[tci];?></td>
			<td class="shoeVciResults" align="center" width="30"><?=$myrow[vci];?></td>
			<td class="shoeCheckboxResults" align="center" valign="top" height="20"><input type=checkbox name=shoes[] value="<?=$myrow[product_image]?>"></td>
		</tr>
	<?
  	} while ($myrow = mysql_fetch_array($result)); ?>
	</table>
	<? } else {
			echo "Sorry, no records were found";
		} ?></td>
          </tr>

<tr>
<td width="5%">&nbsp;</td>

[Drakla]

Javascript. Or when you process the data in your receiving script then just process the first 4 items.

[msmysql]

Can you expand on that? I am not familiar with that functionality of java scripting. How would it work with the code that I sent.

[Drakla]

Well there's this thing called getElementsByTagName in javascript, and you'd find all your checkboxes within a certain element, then count how many were checked. I can't go into specifics as they kick you in the face with an iron clog if you out any javascript round here. Sneak off to a javascript help site, or google for javascript and form elements and that should get you somewhere.

I'd still recommend testing in your receiving page in case they don't have any javascript on.