叉号(x)的纯css3画法:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>css3画 叉 号</title>
<style>
b {display:inline-block; width:12px; height:2px; background:#f00; font-size:0; line-height:0;vertical-align:middle;-webkit-transform: rotate(45deg);}
b:after { content:'.'; display:block; width:12px; height:2px; background:#f00;-webkit-transform: rotate(-90deg);}
</style>
</head>
<body>
<b></b>
</body>
</html>