I didn't know either, having no idea right know, hope you'll find a way though... sometimes people forget its referrer that's why i think typing referrer is not the best option. Add the function to format text from bold, italic, size, colour, font type, smilies, etc... I don't have any idea how to make it happen though, perhaps using javascript...
On large monitors the background image repeats and looks cut and not cosmetically appealing, try using a smaller background image that is a .gif file that patterns very well with repeat-x and repeat-y this will improve the image load times as well.