Shoutbox

im [trying to] make a css switcher for my site using php, and i suck at php still XD

why wont it work?
this is in the head section -

code:

---

<?php
$myStyleColour = $_POST['styleColour'];

if($myStyleColour=="red"){
    print '<link rel="stylesheet" type="text/css" href="css/styles2.css" />';
    } else{
    /*if($myStyleColour=="normal")*/
    print '<link rel="stylesheet" type="text/css" href="css/styles.css" />';
    }
?>

---

and this is in the body -

code:

---

<input type="radio" name="styleColour" value="red" onselect="<?php
print "$myStyleColour"; ?>">Red<br>
<input type="radio" name="styleColour" value="normal" onselect="<?php
print "$myStyleColour"; ?>">normal<br>

---

any help would be appreciated, and no doubt its something stupid/obvious/is a syntaxical error