
Here is a " box" that has rounded corners without the use of images. It's from Stu Nicholl's CSS Play site, and he calls it "Snazzy Borders."
Based on Nifty Corners By Alessandro Fulciniti
http://pro.html.it/esempio/nifty/
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Here is the style sheet for "Snazzy Borders":
<style type="text/css">
#xsnazzy h1, #xsnazzy h2, #xsnazzy p {margin:0 10px; letter-spacing:1px;}
#xsnazzy h1 {font-size:2.5em; color:#fff;}
#xsnazzy h2 {font-size:2em;color:#06a; border:0;}
#xsnazzy p {padding-bottom:0.5em;}
#xsnazzy h2 {padding-top:0.5em;}
#xsnazzy {background: transparent; margin:1em;}
.xtop, .xbottom {display:block; background:transparent; font-size:1px;}
.xb1, .xb2, .xb3, .xb4 {display:block; overflow:hidden;}
.xb1, .xb2, .xb3 {height:1px;}
.xb2, .xb3, .xb4 {background:#d4d4d4; border-left:1px solid #08c; border-right:1px
solid #08c;}
.xb1 {margin:0 5px; background:#08c;}
.xb2 {margin:0 3px; border-width:0 2px;}
.xb3 {margin:0 2px;}
.xb4 {height:2px; margin:0 1px;}
.xboxcontent {display:block; background:#d4d4d4; border:0 solid #08c; border-width:0
1px;}
</style>