mark标签：
mark元素表示页面中需要突出或高亮显示的内容，在搜索结果中也常常出现，比如检索结果中的关键词高亮显示。
案例：
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>HTML5每日一练之mark标签的应用</title>
</head>
<body>
<p>HTML5|CSS3|论坛 | <mark>前端开发！</mark></p>
<p>HTML5论坛，CSS3论坛，CSS论坛，WEB前端开发论坛，教程资源完全免费的网页教学网</p>
</body>
</html>语法：
marks : none | crop || cross
参数：
none : 无页标记出现
crop : 在页面将会被裁切处指定切割标记
cross : 指定交叉线标记用来供页面对齐
说明：
印刷业的印刷文档通常在页面内容区域外带有一些标记，用来校正和调整所有的页面。此属性用来设置或检索什么样的标志是应该在页容器外边被给予。
目前IE5.5尚不支持此属性。
对应的脚本特性为marks。请参阅我编写的其他书目。
示例：
body { marks: crop cross }The above is the detailed content of css: mark tag usage examples. For more information, please follow other related articles on the PHP Chinese website!
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