I have seen plenty of tutorials on how to use CSS for rounded corners in rectangles. However, there is nothing that covers a "cornerstone" image. How would you create one that will always sit in the bottom right corner no matter how wide someone's screen is? Would the positioning of that stand-alone element work using margins?

www.chicagotraindealers.com/manu...s.htm
This looks like an option but it appears to use table elements.

www.albin.net/css/roundedcorners
This explains it somewhat better

Any input is appreciated. This would be my first corner layout but I think I am ready to break out of the box and at least TRY to develop something like this which is cross browser/cross resolution compatible