Add a blue quote to your post or comments like
battle.net forums, using [bluequote][/bluequote].
Example:
[bluequote]Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nunc quam velit, ornare eu pulvinar eget, pretium vel tortor. Aenean vitae purus sit amet tellus congue pulvinar vitae non sem. Aliquam ut felis urna, eu lobortis nulla. Mauris leo lectus, suscipit non consectetur in, pretium id felis. Nunc sed nisi vitae tortor aliquam mollis.[/bluequote]
You can add inside [bluequote] all type of html code, images, flash, all you want... but check that this content are correct or can break the bluequote.