If you ever experience the following problem using Cute Editor in a Ajax ModalPoupExtender:
Any file dialogs are showed behind the popup that contains the cute editor, just update the cssclass adding a z-index value as follows:
<AjaxControlToolkit:ModalPopupExtender … BackgroundCssClass="modalBackground" … />
In Style sheet:
.
modalBackground { … z-index: 50 !important;}
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Shirley