Oops, now I'm tired and just can't make this thing work.

I have a page showing a specific listing for a chosen week.
So I made a form where I can pick a week number from a list.
Then I want my page to reload setting that week. Maybe would be good to make a Session of that as well, so I can remember it.

This is what I got now, that isn't working of course. But I've been doing stuff for hours now and just gt tired when I got to this.

PHP Code:
<form name="form1" id="form1" method="post" action="index3.php?week=<?php echo $row_rs_week['week']?>">
  <select name="week" id="week">
    <?php
do {  
?>
    <option value="<?php echo $row_rs_week['week']?>"<?php if (!(strcmp($row_rs_week['week'], date("W")))) {echo "SELECTED";} ?>><?php echo $row_rs_week['week']?></option>
    <?php
} while ($row_rs_week mysql_fetch_assoc($rs_week));
  
$rows mysql_num_rows($rs_week);
  if(
$rows 0) {
      
mysql_data_seek($rs_week0);
      
$row_rs_week mysql_fetch_assoc($rs_week);
  }
?>
  </select>
  <input type="submit" name="Submit" value="SHOW" />
</form>