Round rectangles in website

I'm working on a web site with Expression Web. I came across this website http://www.ecodetox.ca and what I really liked was how everything seemed to be in round rectangles. I also noticed the 开发者_如何学运维background had a drop shadow. I'm wondering how I could achieve this type of effect in expression web without using loads of images from Photoshop. Thanks

All those rounded corners are images :

http://www.ecodetox.ca/images/middle-accueil/middle_01.jpg http://www.ecodetox.ca/images/menu/menu_01.jpg

The methods for doing this are numerous and will depend on the actual design you want for your site. You will need familiarity with CSS and HTML and once you're comfortable you can check out the myriad tutorials online