<?php
 
if($_POST['do'] == 'labas')
 
     {
 
           if($_SESSION['u_labas'] == 0){
 
echo "<form action='' method='post'><input type='submit' name='submit3' value='test' /><input type='hidden' value='labas' name='do'></form>";}
 
if ($_POST['submit3'] == "test") {
 
printf("<script>alert('AMEN!');</script>");
 
}
 
}
 
?>