The left offset has the same problem as the top offset, so another function needs modifying:

(add the code between  <inserted></inserted> tags below)

    _getLeftOffset : function() {
        /// <summary>
        /// Get the left offset for the popup
        /// </summary>
        /// <returns type="Number" integer="true">
        /// Left offset for the popup
        /// </returns>
 
        // Get the left offset for the popup
        if (AjaxControlToolkit.PopupControlPopupPosition.Left == this._position) {
            return (-1 * this.get_element().offsetWidth) + this._offsetX;
        } else if (AjaxControlToolkit.PopupControlPopupPosition.Right == this._position) {
            return this.get_element().offsetWidth + this._offsetX;
        } else {
            return this._offsetX <inserted>+ this.findScrollOffset('x')</inserted>;
        }
    },

note: function "this.findScrollOffset" was added in last post.

Other controls (like HoverMenu) have the same issue with different javascripts - so similar fixes are required.

Has anyone gotten this js modification to work for the ModalPopup control? I made the mods and did a recompile and it did not work.

Jon