i need help with php and sql

i am trying to retrieve a data according to the register form,in my second form i can find my drop down list working but when i select one of it is not displaying the information in the table that was registered from my first page.
this is my code.

mysql_select_db($database_universal, $universal);
//to select the invoice number from first page//

$query_ProForma = "SELECT inv_no,product_name FROM ho_add_stock_proforma";
$ProForma = mysql_query($query_ProForma, $universal) or die(mysql_error());
$row_ProForma = mysql_fetch_assoc($ProForma);
$totalRows_ProForma = mysql_num_rows($ProForma);
$insertID = mysql_insert_id();



//to display the drop down list which is doing and working//

<p>Pro Forma Invoice Number<br />
<label for="pro_inv_no"></label>
<select name="pro_inv_no" autofocus="autofocus" class="dropdown_long" id="pro_inv_no">
<option value="Selected">Select Invoice Number</option>
<?php
do {
?>
<option selected="selected" value="<?php echo $row_ProForma['inv_no']?>"><?php echo $row_ProForma['inv_no']?></option>
<?php
} while ($row_ProForma = mysql_fetch_assoc($ProForma));
$rows = mysql_num_rows($ProForma);
$id =" pro_forma_inv_no";
$selected="selected";
if($id==$selected){
for ($j = 0 ; $j < $rows ; ++$j){

mysql_data_seek($ProForma,$rows[0]);
$row_ProForma = mysql_fetch_array($ProForma);

} }
?>
</select>
</p>
//to display the data to the field after selecting on the option which is not doing//


<td scope="col" > PRODUCT NAME<input name="pro_product_name" type="text" class="table_fields" id="product_name"
size="10" value="
<?php
echo $row_ProForma['product_name']; ?>" />
</td>

Are you sure you doing ICT2613?

There are no invoices, products or drop down lists.

not yet registered for ict2613,
pls this a project of my own.that i need help on

Yip, I need help with bond repayments Not knocking you, but please understand that as much as we would like to help you, there simply is no time on our side .This is a course-specific forum, so rather try one of many other PHP forums on the 'net. Sorry mate.

Hahaha, Just got trolled, You sir deserve my like (If only there was a thumbs up )

hahaha!

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int get_random_number() {
return 4;
}