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How Web Forms prohibit the entry of certain symbols

Source: Internet
Author: User
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In the form of a Web page, you can disallow the simple implementation of some symbols, such as the following code is forbidden: "*", "^" and "|" Three symbols

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题 1</title>
<body>
<input onkeyup="this.value=this.value.replace(/[\*\^\|]+/,'');" value="" size="20" />
</body>

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