如何只验证onkeypress的javascript中的字符 [英] how to validate only characters in javascript of onkeypress
本文介绍了如何只验证onkeypress的javascript中的字符的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我没有得到如何验证代码请回复....
解决方案
请尝试以下代码
<%@ Page 语言 = C# AutoEventWireup = true CodeBehind = WebForm2.aspx.cs 继承 = UserInterface.WebForm2 %>
< !DOCTYPE html PUBLIC - // W3C // DTD XHTML 1.0 Transitional // EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd >
< html xmlns = http://www.w3.org/1999/xhtml >
< head runat = server >
< title > < / title >
< script type = text / javascript >
功能 Valida te()
{
var charactersOnly = document .getElementById(' <%= txtName.ClientID%>')。value;
if (charactersOnly.search(/ ^ [a-zA-Z] +
/)=== -1)
{
alert( 仅字符);
document .getElementById(' <% = txtName.ClientID%>')。value = ;
}
}
< / script >
< / head >
< 正文 >
< < span class =code-leadattribute> form id = form1 runat = server >
< div >
< asp:TextBox ID = txtName runat = server onkeyup = 验证() > < / asp:TextBox >
< / div >
< ; / form >
< / body >
< / html >
浏览以下链接。
http://www.w3resource.com/javascript/form/all-letters-field.php [ ^ ]
希望这会有所帮助你
I am not getting how to validate the code please reply....
解决方案
Please try following code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="UserInterface.WebForm2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script type="text/javascript"> function Validate() { var charactersOnly = document.getElementById('<%=txtName.ClientID %>').value; if (charactersOnly.search(/^[a-zA-Z]+
/) === -1) { alert("Only characters"); document.getElementById('<%=txtName.ClientID %>').value = ""; } } </script> </head> <body> <form id="form1" runat="server"> <div> <asp:TextBox ID="txtName" runat="server" onkeyup="Validate()" ></asp:TextBox> </div> </form> </body> </html>
Go through the below link.
http://www.w3resource.com/javascript/form/all-letters-field.php[^]
Hope this will help you.
这篇关于如何只验证onkeypress的javascript中的字符的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文