CSS实现 DIV 在页面垂直居中两例
!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" / titleU
<!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>Untitled 1</title>
</head>
<body style="text-align:center; height:779px; margin:0 auto;">
<div style="width:200px;height:200px; background-color:aqua;">adsaadasdasdasdsdsd</div>
</body>
</html>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
<!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>Untitled 1</title>
</head>
<body style="text-align:center; height:779px; margin:0 auto;">
<div style="width:200px;height:200px; background-color:aqua; line-height:200px;">adsaadasdasdasdsdsd</div>
</body>
</html>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled 1</title>
</head>
<body style="text-align:center; height:779px; margin:0 auto;">
<div style="width:200px;height:200px; background-color:aqua;">adsaadasdasdasdsdsd</div>
</body>
</html>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
<!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>Untitled 1</title>
</head>
<body style="text-align:center; height:779px; margin:0 auto;">
<div style="width:200px;height:200px; background-color:aqua; line-height:200px;">adsaadasdasdasdsdsd</div>
</body>
</html>
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
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