编程字典

源代码

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>编程字典</title>
</head>
<body>

<!DOCTYPE html>
<html>
<head>
<style>
#rcorners1 {
 border-radius: 25px;
 background: #73AD21;
 padding: 20px;
 width: 200px;
 height: 150px;
}

#rcorners2 {
    border-radius: 25px;
    border: 2px solid #73AD21;
    padding: 20px;
    width: 200px;
    height: 150px;
}

#rcorners3 {
 border-radius: 25px;
 background: url(paper.gif);
 background-position: left top;
 background-repeat: repeat;
 padding: 20px;
 width: 200px;
 height: 150px;
}
</style>
</head>
<body>

The border-radius property allows you to add rounded corners to elements.
Rounded corners for an element with a specified background color:
Rounded corners!
Rounded corners for an element with a border:
Rounded corners!
Rounded corners for an element with a background image:
Rounded corners!

</body>

</html>

</body>
</html>

运行结果