Checkboxes and Arrays

[Anon]

Ok, having a problem with checkboxes and arrays.

Trying to take multiple items and update them all at once using a checkbox in each one keyed by a unique item number.

here's a snipet of the code...
this is the array builder and update sql
if($jump == "faq_update"):

//count number of items to loop thru
$num_rows = count($fid);
//loop thru items
for($i = 0; $i < $num_rows; ++$i):
if($display[$i] == yes):
$update = "UPDATE faqs SET question = \"$question[$i]\", answer = \"$answer[$i]\", display = \"yes\" WHERE fid = \"$fid[$i]\"";
$result = mysql_query($update) or die ("Could not update");
else:
$update = "UPDATE faqs SET question = \"$question[$i]\", answer = \"$answer[$i]\", display = \"no\" WHERE fid = \"$fid[$i]\"";
$result = mysql_query($update) or die ("Could not update");
endif;

	endfor;

else:

			else:

			echo"
			<table width = 95% border = 0 bordercolor = black cellpadding = 0 cellspacing = 0>";

			$faq = mysql_query("SELECT * FROM faqs ORDER BY fid");
			while($result = mysql_fetch_array($faq)):
			$fid = $result["fid"];
			$question = $result["question"];
			$answer = $result["answer"];
			$display = $result["display"];


			echo"
			<form action = \"$PHP_SELF?jump=faq_update&admin_dir=home\" method = post>
			<input type = hidden name = fid[] value = $fid>
			<tr>
				<td height = 10>
				&nbsp;
				</td>
			</tr>
			<tr>
				<td height = 10 width = 100% bgcolor = 8da886 class = menu align = left valign = top>
				Question:
				<textarea $answer name = question[] class = faqIndexQ cols = 40 rows = 10>$question</textarea>
				</td>
			</tr>
			<tr>
				<td width = 100% bgcolor = 8da886 class = menu align = left valign = top>
				Answer:
				<textarea $answer name = answer[] class = faqIndexA cols = 40 rows = 10>$answer</textarea>
				</td>
			</tr>
			<tr>
				<td width = 100% bgcolor = 8da886 class = menu align = left valign = top>
				Display";
				if($display == yes):
				echo"<input type = checkbox name = display[] class = faqcheckbox value = yes checked>";
				else:
				echo"<input type = checkbox name = display[] class = faqcheckbox value = yes>";
				endif;
				echo"
				</td>
			</tr>
			<tr>
				<td width = 100% bgcolor = 8da886 class = menu align = left valign = top>
				&nbsp;
				</td>
			</tr>";

			endwhile;

			echo"
			<tr>
				<td width = 100% bgcolor = 8da886 class = menu align = left valign = top>
				<input type = submit class = prodButton value = \"Update\">
				</td>
			</tr>
			</table>
			</form>";

endif;

when I run this code it just doesn't act right...

Anyone have any ideas