javascript特效：只能输入数字
<html xmlns=" http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
?<!-- Created by TopStyle Pro Trial Version -? www.bradsoft.com -->
?<title></title>
?
</head>
<body>
<script type="text/javascript">?
// 说明 ： 用 Javascript 实现只能输入数字的文本框
// 整理 ： CodeBit.cn (? http://www.CodeBit.cn )
?function checkNumber(e) {????
?var key = window.event ? e.keyCode : e.which;???
? var keychar = String.fromCharCode(key);????
? var el = document.getElementById('test');????
? var msg = document.getElementById('msg');????? reg = /\d/;???
?? var result = reg.test(keychar);???
? if(!result)? {?? el.className = "warn";????????? msg.innerHTML = "只能输入数字";????????
? return false; }????
? else? {?????????
? el.className = "";????????? msg.innerHTML = "";???????? return true;???
?? }
?? }?
? </script>?
?<div id="test">
???? 请输入数字：<input type="text" onkeypress="return checkNumber(event);" />
??? <span id="msg"></span>
</div>
</body>
?
?
