JavaScript malfunctioning in primary content or header content

When I write JavaScript code in the following format:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

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

...

It runs perfectly and the JavaScript functions as expected.

However, when I use the same JavaScript code on another page like this:

<%@ Page Title="About Us" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
    CodeFile="About.aspx.cs" Inherits="About" %>

...

The JavaScript does not work without any error messages.

I am using Visual Studio 2010 for ASP.NET C# development.

c#javascriptasp.net

Answer №1

Make sure to provide the actual ID of the button that you receive after the page has been rendered. (You can find this by viewing the page source).

<asp:TextBox ID="txtfirst" runat="server" onkeyup="SetButtonStatus(this,'ContentPlaceHolder1_btnButton')"></asp:TextBox>
<asp:TextBox ID="txtText" runat="server" onkeyup="SetButtonStatus(this,'ContentPlaceHolder1_btnButton')"></asp:TextBox>

This method will be successful.

Appreciate it!

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