How to make items float outside of Jquery Dialogs

I want to have a dialog that looks kinda like this:

I thought this approach would work but I guess I was wrong:

JavaScript

//Creates The Dialog
$('.ImageDialogDiv').dialog({
    position: [98, 223],
    resizable: false,
    //modal: true,   /* UNCOMMENT AFTER DEBUGGING */
    closeOnEscape: false,
    class: 'OverwriteDialogOverflow',
    title: $('#hiddenDialogElements').html(),
    open: function (event, ui) { $(".ui-dialog-titlebar-close").hide(); }
});

CSS

  /*
  * Overrides hidden overflow
  */
 .OverwriteDialogOverflow
 {
     overflow: visible;
 } 

HTML

<div id = "dialogDiv" class = "ImageDialogDiv"></div>

<div id = "hiddenDialogElements">
    <button id = "hiddencloseButton">Close</button>
    <div id = "hiddenArrowButtons">
        <button class = "ArrowButtonDialogLeft" onclick = "ShowNextImage(-1)" ></button>
        <button class = "ArrowButtonDialogRight" onclick = "ShowNextImage(1)" ></button>
    </div>
</div>

When I attempt to move the arrows or close button off of the dialog, then get cut off and will not be visible. I though that adding .OverwriteDialogOverflow would take care of that.

Suggestions?

I'll edit this with more detail if/when you update the post, but what I would do is put the dialog and buttons in a container div with relative positioning, and use absolute positioning to place the buttons. Something like below...

HTML:

    <div id = "hiddenDialogElements">
        <button id = "hiddencloseButton">Close</button>
        <div id = "hiddenArrowButtons">
            <button class = "ArrowButtonDialogLeft" onclick = "ShowNextImage(-1)" ></button>
            <button class = "ArrowButtonDialogRight" onclick = "ShowNextImage(1)" ></button>
        </div>
    </div>
</div>

CSS:

.OverwriteDialogOverflow { overflow: visible; }

#dialogContainer { position: relative; }

#hiddencloseButton {
    position: absolute;
    top: -15px;
    right: -15px;
}

#hiddenArrowButtons {
    position: absolute;
    bottom: -30px;
}

.ui-dialog { overflow: visible; }

Edit: added .ui-dialog CSS as per comment