In htsrv/comment_post.php find the bit that looks like this and add the red bit

if( empty($comment) )
{ // comment should not be empty!
errors_add( T_('Please do not send empty comment') );
}

if( !(strpos($comment,"href")===false && strpos($comment,"www")===false && strpos($comment,"http")===false )) errors_add( T_('Please do not post any links') );

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Holy cow that is AWESOME! thanks a million. And thanks for such a speedy reply!

Rob

No problem :)

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Also wanted to thank you for this. Exactly what I was looking for!