<script type="text/javascript">
function writecode() {
document.getElementById('showcode').value="<script type='text/javascript' src='http://publicoll.com/banner.php?user=<?php echo $username; ?>&amp;bgcolor=blaat'></script>";
     }
</script>

<script type="text/javascript">
function writecode() {
document.getElementById('showcode').value="<script type='text/javascript' src='http://publicoll.com/banner.php?user=<?php echo $username; ?>&bgcolor=blaat'></script>";
     }
</script>

<script type="text/javascript">
function writecode() {
	var javaScript = "<script type='text/javascript' src='http://publicoll.com/banner.php?user=<?php echo $username; ?>&bgcolor=blaat'></script>";
	document.getElementById('showcode').value = javaScript;
}
</script>

echo "
<script type=\"text/javascript\">
function writecode() {
document.getElementById('showcode').value=\"<script type='text/javascript' src='http://publicoll.com/banner.php?user={$username}&bgcolor=blaat'></script>\";
     }
</script>";