控制文本框输入

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebLibrary.JS.控制输入.WebForm1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

</head>

<body>

<div>

输入数字<asp:TextBox ID="txtNumber" runat="server" onkeypress="if (event.keyCode < 48||event.keyCode >57) event.returnValue = false;"></asp:TextBox>

<br />

输入字母<asp:TextBox ID="txtLetter" runat="server" onkeypress="if (event.keyCode < 65||event.keyCode >123) event.returnValue = false;"></asp:TextBox>

</div>

</form>

</body>

</html>