error checking woes

[Jack Jackson <jackson.linux@xxxxxxxxx>]

Hi,
Now that the drop down is working properly (thanks!!), I am trying to 
validate, and having LOTS of trouble. After being ceaselessly derided 
last night on an irc channel for my dimwitedness, I am still not any closer.

The code which works is this:

function GetQuestionsDropdown($cat){
//first get all the questions

$sql = "SELECT * FROM questions WHERE questions.q_cat=$cat AND 
questions.q_style=1";

$result = mysql_query($sql);
	//now one-by-one go through the questions
	while($row = mysql_fetch_assoc($result)) {
		
		//if the form has been submitted, and the question unanswered
		//highlight this whole question and answer block in red.
		if ($message[$row['q_name']] == 1){
			echo "<div class='error'>";
			}
		
		//Make a question set div wrapper
		echo "<div class='q_set'>\n";
		//State the question
		echo "<div class='question'>";
		echo $row['q_text'] . "</div>";
		echo "\n\n";
		echo " <div class='answer'>";
		echo "\n";
		
		//Create the dropdown for the answers
		echo '  <select name="' . $row['q_name'] . '">';
		echo "\n";
		
		//get all of the answers for THIS question
	$ans_sql = "select * from answers where answers.q_id=" . $row['q_id'];
	$ans_result = mysql_query($ans_sql);

		echo "    <option value=\"\">Select from this list</option>\n";
	while($ans_row = mysql_fetch_assoc($ans_result)) {
		
		//list the answers for THIS question
		echo "    <option ";
		echo "value=\"" . $ans_row['a_id'] . "\"";

		if  ($row['q_name'] == $ans_row['a_id']) {
			echo " selected";
			}

		echo ">" . $ans_row['a_answer'] . "</option>";
		echo "\n";
		}
		echo '  </select>' . "\n" . ' </div>' . "\n";
		echo "</div><!--q_set-->\n\n";
		//If there *was* an error div, close it
		if (sizeof($message[$row['q_name']])){
			echo "</div><!--/error-->";
			}
	}
    }//function GetQuestionsDropdown


NOW I have to validate after it's submitted. I am trying to look and 
see, if $_POST[$row['q_name']] is empty then make message of the same 
name = 1, so if

   if(empty($_POST['partners'])) {
       $message['partners'] = '1'
}

Then when I restate the dropdown function, and it shows the questions 
again,  those error checking things I built in will
	a) show a div class=error around questions with a message
	b) pre-select the previously selected answers (because I have put in 
the thing in the dropdown which says

 if ($row['q_name'] == $ans_row['a_id']) { echo " selected";}


The validate code I was trying, the subject of such howling on IRC (and 
I know it doesn't work, but not why) was:

function ValidatePost($cat){
	//first get the q_names
$sql = "SELECT * FROM questions WHERE q_cat=$cat";
$result = mysql_query($sql);

//go through the question set
	while($row = mysql_fetch_assoc($result)) {
	
	  if(empty($_POST[$row['q_name']])){
	
	  $message[$row['q_name']] == "1";
	  }
	}
}//function ValidatePost

Can anyone tell me what I am doing wrong?

Thanks!
JJ

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