Experiencing perplexity due to receiving this error message: "Unable to access property 'checked' of an undefined or null reference."

When using .checked in a Function, it stops working and generates the following Error. I am currently utilizing Visual Studio 2015. Please assist.

function GenderValidation(sender , e)
    {
        var male = document.getElementById('RadioButton_male').Checked;
        var female = document.getElementById('RadioButton_female').Checked;
        if (male == true || female == true)
        {
            e.IsValid = true;
        } else {
            e.IsValid = false;
        }

    }

**

  • 0x800a138f - JavaScript runtime error: Unable to get property 'checked' of undefined or null reference

**

This is my Complete code

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="contactus.aspx.cs" Inherits="DVManagmentProject.contactus" %>

<!-- Rest of the original HTML content goes here... -->

 

This is Debbuger Code

  [1]: https://i.sstatic.net/PG8hC.jpg
  [2]: https://i.sstatic.net/Jqw0X.jpg
  [3]: https://i.sstatic.net/DuaNT.jpg
  [4]: https://i.sstatic.net/DrTPP.jpg
  [5]: https://i.sstatic.net/1Dhc1.jpg
  [6]: https://i.sstatic.net/880dI.jpg
  [7]: https://i.sstatic.net/DWQ7D.jpg
  [8]: https://i.sstatic.net/LdHXg.jpg
  [9]: https://i.sstatic.net/xVXI1.jpg
  [10]: https://i.sstatic.net/qC4LA.jpg

Answer №1

Issue Resolved! I made adjustments to:

ContentPlaceHolder1_RadioButton_male and ContentPlaceHolder1_RadioButton_female

instead of :

RadioButton_male and RadioButton_female

I also updated the Javascript function by changing (.Checked) to (.checked) which successfully resolved the issue.

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