
<?php
ob_start();
session_start();
?>
<script type="text/javascript">
function goto(URL){
window.location.href = URL;
}
</script>
<?

$at = array (
    'H' => 'waterstof',
    'He' => 'helium',
    'Li' => 'lithium',
    'Be' => 'beryllium',
    'B'  => 'boor',
    'C'  => 'koolstof',
    'N'  => 'stikstof',
    'O'  => 'zuurstof',
    'F'  => 'fluor',
    'Ne' => 'neon',
    'Na' => 'natrium',
    'Mg' => 'magnesium',
    'Al' => 'aluminium',
    'Si' => 'silicium',
    'P'  => 'fosfor',
    'S'  => 'zwavel',
    'Cl' => 'chloor',
    'Ar' => 'argon',
    'K'  => 'kalium',
    'Ca' => 'calcium',
    'Cr' => 'chroom',
    'Mn' => 'mangaan',
    'Fe' => 'ijzer',
    'Co' => 'kobalt',
    'Ni' => 'nikkel',
    'Cu' => 'koper',
    'Zn' => 'zink',
    'Ge' => 'germanium',
    'As' => 'arseen',
    'Br' => 'broom',
    'Kr' => 'krypton',
    'Ag' => 'zilver',
    'Cd' => 'cadmium',
    'Sn' => 'tin',
    'Sb' => 'antimoon',
    'I'  => 'jood',
    'Xe' => 'xenon',
    'Ba' => 'barium',
    'Pt' => 'platina',
    'Au' => 'goud',
    'Hg' => 'kwik',
    'Pb' => 'lood',
    'Rn' => 'radon',
    'U' => 'uranium',
    'Pu' => 'plutonium',
);



if( !isset($_POST['submit']) ) {
	$_SESSION['rand'] = array_rand($at);
	?> 
	<form action="" method="post">
	<?=$_SESSION['rand']?><br />
	<input type="text" name="input" /><br />
	<input type="submit" name="submit" value="check" />
	</form>
	<?php
}
else {
	if( $_POST['input'] == $at[$_SESSION['rand']] ) {
		echo  $_POST['input']." is correct";
		$_SESSION['goed']++;
	}
	else echo "fout, juist antwoord was ".$at[$_SESSION['rand']];
	
	$_SESSION['totaal']++;
	echo "<br /><br />".$_SESSION['goed']."/".$_SESSION['totaal']." goed<br /><a href=\"\" onClick=\"javascript:goto(chemie.php)\">Nog eens proberen</a>";
}
?>
