<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>JS控制非法字符的输入</title>
</head>
<body>
<form>
<p>这里不允许输入如下字符:(像!@#$%^&*等）<br>
<textarea rows="2" cols="20" name="comments" onkeypress="checkComments()"></textarea>
</p>
<p>这里不允许输入引号：<br>
<input type="text" name="txtEmail" onkeypress="checkEmail()"/>
</p>
<p>这里只能输入数字：<br>
<input type="text" name="txtPostalCode" onkeypress="checkPostalCode()"/>
</p>
<p>这里只能输入大写英文：<br>
<input type="text" name="txtEnglish" onkeypress="checkEnglish()"/>
</p>
</form>
</body>
</html>
