How to get my msg box to work

I have an asp application where I show a "confirm" msg box. I am not able to code my mark up or code behing to capture the result, Can someone help?

calls the msg box sub

ASPNET_MsgBox_Confirm(Response(0))

Code (markup):

the msg box sub

Public Overloads Sub ASPNET_MsgBox_Confirm(ByVal Message As String) 'Confirm

        hiddenMsgDiv.InnerHtml = "<script type=""text/javascript"">confirm('" & Message.Replace("\", "\\").Replace("'", "\'") & "');</script>"

End Sub

Code (markup):

This is what I have for my "alert" but not sure how to go about the confirm

<div id="hiddenMsgDiv" runat="server" style="display: none">
    </div>

Code (markup):

 

If you setting any div to display:none,then all the script in this div won't work at all.

 

In you javascript code, just assign the result of confirm() to a local variable:

var result = confirm(...)