<!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=GB2312" />
<title>正则实现文本框只能输入正整数</title>
</head>
<body>
<input type="text" onKeyUp="this.value=this.value.replace(/\D/g,'')" onafterpaste="this.value=this.value.replace(/\D/g,'')" />
</body>
</html>