<?php

$al = $_GET['al'];

if ($al) {

$al = htmlspecialchars($al);

echo "<p><b>fuck you,</b><br>$al</p>";

}

?>

pastebin

this will output something like
fuck you,
customized alert

and you append ?al=my alert here at the end of the url

this does not work on myspace. it's for php enabled web sites.

not my problem if it doesn't work