Rounded rectangle without using CSS3

Then you need to use images for that. Here's a site that will create any color rounded box images for you and also give you CSS for it

http://wigflip.com/cornershop/

ok 

Is CSS3 code show in IE6+?

i like use code instesd of image and I want use shadow and other effect for my div that show in IE & other browser  is it possible?

No CSS3 is only suported in IE9+.If you need shadow you need to get a graphic image with shadow