bb code, highlight text in new window?

[Luggruff]

I have a bb code to popup the forum rules in a new stripped window (no adress bar or anything).. and when it does, it scrolls to the title of the rule specified in the tag ( < a name="8" > #8 </ a> Private info! ) and it follows:

PHP Code:

<a href="#" onclick="window.open('http://www.hlforum.net/rules.php{option}','buddylist','statusbar=no,menubar=no,toolbar=no,scrollbars=yes,resizable=yes,width=600,height=500'); return false;"><span style="background-color: #FF0000; color: #FFFFFF ;">{param}</span></a> 


and the bb code itself:

PHP Code:

[rules=#8]Varning text here[/rules] 


..is there a way to add to the bb-code code a highlight of the title? ( in this case.. #8)

..basicly: what's the php/html for highlighting text?