dis is unpossible..!1

gistfile1.js

// Dialog.js
var widget = {
    confirmDeleteButton: registry.byId('confirmDeleteButton'),
};

var func = {
    onAwesome: function(evt) {
                    alert(1);
    }
};

on(widget.confirmDeleteButton, 'click', func.onAwesome);

// End of Dialog.js

// Dialog.html

<div data-dojo-type="dijit/Dialog" data-dojo-id="confirmBox">
  <p>Are you sure you want to delete this?</p>
  <span class="spacer"></span>
  <button id="confirmDeleteButton">Delete</button>
  <button id="closeConfirmBox">Cancel</button>
</div>

// End Dialog.html