把 DIV 转为圆角矩形，支持背景图
感谢6楼的帮助，现在 IE、FF、OP 均通过测试！（代码已更改）
背景图仅仅支持平铺……
还有个不好的地方，控制样式必须写在style属性里，关联的class不行。。。。
偶做了一下午，希望大家一起来改进。。
调用方法：
1、把 JS 函数 copy 到页面里先。
2、给要变圆角的 div 设置一个 id，比如 abc
3、在 div 后面写：<script> yj("abc"); </script> 即可
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
<script>
function yj(id){
/* circular bead 2008
code by : weiweiok
thanks : goodlucklg
*/
var obj = document.getElementById(id);
var content = obj.innerHTML;
var s = obj.style;
var width = s.width.replace(/px/gi,"");
var height = s.height.replace(/px/gi,"");
var bc = s.borderColor;
var bg = s.backgroundImage;
var bgc = s.backgroundColor;
var p = s.padding;
var pt = s.paddingTop.replace(/px/gi,"");
var pr = s.paddingRight.replace(/px/gi,"");
var pb = s.paddingBottom.replace(/px/gi,"");
var pl = s.paddingLeft.replace(/px/gi,"");
s.padding = "";
s.width = "";
s.height = "";
s.border = "";
s.background = "";
bc = (bc == "") ? "#000000" : bc;
if(window.navigator.userAgent.indexOf("Firefox")>=0){
bc = String(bc).toLowerCase().replace(/rgb(.+?)/g,function(){return "#"+arguments[0].replace(/(s|(|)|rgb)/g,"").replace(/d+,*/g,function(){return parseInt(arguments[0]).toString(16).toLowerCase();});}).substring(0,7);
}
bgc = (bgc == "") ? "none" : bgc;
pt = (pt == "") ? 0 : Math.round(pt);
pr = (pr == "") ? 0 : Math.round(pr);
pb = (pb == "") ? 0 : Math.round(pb);
pl = (pl == "") ? 0 : Math.round(pl);
width = (width == "") ? (20+pl+pr) : Math.round(width)+pl+pr+2;
height = (height == "") ? (20+pt+pb) : Math.round(height)+pt+pb+2;
a1 = "<div style='font:0px;margin:0px;margin-left:5px;width:" + (width-10) + "px;height:1px;background:"+bc+" '></div>";
a2 = "<div style='font:0px;margin:0px;margin-left:3px;width:" + (width-10) + "px;height:1px;background:"+bgc+" "+bg+" -4px 0px;border-left:2px solid "+bc+";border-right:2px solid "+bc+";'></div>";
a3 = "<div style='font:0px;margin:0px;margin-left:2px;width:" + (width-6) + "px;height:1px;background:"+bgc+" "+bg+" -2px -1px;border-left:1px solid "+bc+";border-right:1px solid "+bc+";'></div>";
a4 = "<div style='font:0px;margin:0px;margin-left:1px;width:" + (width-4) + "px;height:2px;background:"+bgc+" "+bg+" -1px -2px;border-left:1px solid "+bc+";border-right:1px solid "+bc+";'></div>";
a5 = "<div style='margin:0px;padding:"+p+";width:" + (width-2-pl-pr) + "px;height:" + (height-10-pt-pb) + "px;background:"+bgc+" "+bg+" 0px -4px;border-left:1px solid "+bc+";border-right:1px solid "+bc+";'>" + content + "</div>";
a6 = "<div style='font:0px;margin:0px;margin-left:1px;width:" + (width-4) + "px;height:2px;background:"+bgc+" "+bg+" -1px -"+(height-2-10+4)+"px;border-left:1px solid "+bc+";border-right:1px solid "+bc+";'></div>";
a7 = "<div style='font:0px;margin:0px;margin-left:2px;width:" + (width-6) + "px;height:1px;background:"+bgc+" "+bg+" -2px -"+(height-2-10+6)+"px;border-left:1px solid "+bc+";border-right:1px solid "+bc+";'></div>";
a8 = "<div style='font:0px;margin:0px;margin-left:3px;width:" + (width-10) + "px;height:1px;background:"+bgc+" "+bg+" -4px -"+(height-2-10+7)+"px;border-left:2px solid "+bc+";border-right:2px solid "+bc+";'></div>";
a9 = "<div style='font:0px;margin:0px;margin-left:5px;width:" + (width-10) + "px;height:1px;background:"+bc+" '></div>";
obj.innerHTML = a1+a2+a3+a4+a5+a6+a7+a8+a9;
}
</script>
</head>
<body>
<div id="a" style="width:100px;height:100px;border:1px solid red">
你好，圆角！
</div>
<div id="b" style="width:150px;height:110px;border:1px solid #33aa33;background:#66ff66;margin:20px;padding:10px;">
要改变样式，只需在div里写css即可。。。比如我的背景色、边框色
</div>
<div id="c" style="width:300px;height:100px;background:url(http://www.sxrjsc.com/Tmp/a.jpg);padding:10px;color:#ffffff">
还支持背景图。。。不过。。。只支持平铺方式的……
</div>
<script>
document.write("<p><a href='javascript:bian()'>给我圆！！！</a></p>");
function bian(){
yj("a");
yj("b");
yj("c");
}
</script>
</body>
</html>
;padding:10px;color:#ffffff){kind=link}
