How to get the confirmation of Yes/No from a javascript pop-up and display the value on the page

The sample code is on the most frequently asked query on "How to get the
confirmation of Yes/No from a javascript pop up and display the value on the page
using ASP.NET"Create a webpage main.aspx Drag and drop a hidden control and
control on the web form. [bold]Step 1. main.aspx.vb[/bold] Write the following
code on page load event

Button1.Attributes.Add("onclick", "getMessage()")

[bold]Step 2.In main.aspx[/bold] Add the client side-script block

<SCRIPT language=javascript>

function getMessage()

{

var ans;

ans=window.confirm('Is it your confirmation.....?');

//alert (ans);

if (ans==true)

{

//alert('Yes');

document.Form1.hdnbox.value='Yes';

}

else

{

//alert('No');

document.Form1.hdnbox.value='No';}

}

</SCRIPT>

[bold]Step 3. main.aspx.vb[/bold] To display the value of the value selected
by the user in the pop up write the following code

Response.Write(Request.Form("hdnbox"))