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CSS defines a div rounded border

Source: Internet
Author: User
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 <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" &NBSP;

Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd
<meta http-equiv= "Content-type" content= "text/html"; gb2312 "/>
<title>testdiv</title>
<style>
#d1, #d3, #d4 {
margin:5px 0px;
Width : 200px;
Background-color: #eee;
}
#d1 {
border:1px solid #444;
height:100px;
padding:0px 15px;
}
#d3, #d4 {
margin-top:0px
margin-bottom:0px
border-left:1px solid #444;
border-right:1px Solid # 444;
}
. m{
height:100px
width:200px
padding:0px 15px;
position:relative;
}
#d3. m{
margin:-4px 0px;
}
#d4. m{
margin:-5px 0px;
}
. rt,.rb{
Display:block
width:232px;
margin-left:0px;
margin-right:0px;
}
. rt{
margin-top:5px;
}
. rb{
margin-bottom:5px;
}
. RT *,.rb *{
Display:block
height:1px;
   Overflow:hidden;
Background-color: #eee;
border-left:1px solid #444;
border-right:1px solid #444;
}
. r1{
margin:0 5px;
Background-color: #444;
}
. r2{
margin:0 3px;
border-width:0px 2px;
}
. r3{
margin:0 2px;
}
. r4{
margin:0 1px;
height:2px;
}
. rb1{
margin:0 6px;
Background-color: #444;
}
. rb2{
margin:0 4px;
border-width:0px 2px;
}
. rb3{
margin:0 3px;
}
. rb4{
margin:0 2px;
}
. rb5{
margin:0 1px;
height:2px;
}
</style>

<body>
<div id= "D1" >R=...</DIV>
<b class= "RT" ><b class= "R1" ></b><b class= "R2" ></b><b class= "R3" ></B><B&NBSP;
class= "R4" ></b ></b>
<div id= "D3"
<div class= "M" >R=5</DIV>
</div>
<b class= "RB" ><b class= "R4" ></b><b class= "R3" ></b><b class= "R2" ></B><B&NBSP;
class= "R1" ></b></b>
<b class= "RT" ><b class= "Rb1" ></b><b class= "Rb2" > </b><b class= "Rb3" ></b><b 
class= "Rb4" ></b><b class= "Rb5" ></b> </b>
<div id= "d4"
<div class= "M" >R=6</DIV>
</div>
<b class= "RB" > <b class= "rb5" ></b><b class= "Rb4" ></b><b class= "Rb3" ></B><B&NBSP;
Class = "Rb2" ></b><b class= "Rb1" ></B></B>
</body>

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