VS 2012 - Confirmation Dialog In UpdatePanel

A user inserts ad details and on button click saves them to database. If the save is successful, a DIV element slides down (becomes visible) allowing the users to add pictures for that ad.

As the users adds the pictures, they are being shown in a Repeater control. When you hover over a picture, a Delete button is displayed and when you click it, a confirmation message pops out asking the users if they really want to delete the picture.

Now this is where the problems begins. The code behind the button click doesn't wait for the user to click YES or NO. It just executes leaving the message displayed.

So to summarize:

- The entire "bottomDIV" element is wrapped inside an UpdatePanel with update mode set to "Conditional".
- Since the Button is inside the Repeater control, I cannot access its Click event. I use Repeaters ItemCommand to check for the correct Command Name.
- The Repeater Control is inside the same UpdatePanel
- The Update Panel has AsyncPostBackTrigger set to Repeater Control.

The HTML:

HTML Code:
<asp:UpdatePanel ID ="bottomUpdate" runat ="server" UpdateMode="Conditional" >
                         <ContentTemplate>
                        <div id ="bottomWraper">
                        <div id ="savePictureWraper" runat ="server" style="float:left; padding-top:3px;" >
                         <asp:TextBox ID ="pictureName" runat ="server" placeholder ="Naziv slike" style="width:181px;">
[Code] ....

The Script (using alertify.js to display the confirmation dialog):

HTML Code:
<script>           
        $("[id*=btnDeletePicture]").on("click", function () {
                alertify.confirm("Confirm?", function (e) {
                    if (e) {
                        alertify.alert("Successful AJAX after OK");
             
[Code] ....

The code behind is simple and all it does it executes the delete statement and then calls the displayPictures sub again. So, why the code behind doesn't wait for the user to select an option in confirmation dialog....