Вот так:
</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Исходный код </td></tr><tr><td id="CODE">
[color=green;background-image:url('javascript:alert("Мда.. Хех")')]Мдаа..[/color]
[/QUOTE]<span id='postcolor'>