hi,
when i do :
when i do :
$find("<%= AddActiviteWindow.ClientID %>").getWindowBounds(); i get :this is because in _getCurrentBounds you do : var c=(this._popupElement.style.display=="none")?true:false;Uncaught TypeError: Cannot read property 'style' of null Telerik.Web.UI.WebResource.axd:7068
a.RadWindow._getCurrentBounds Telerik.Web.UI.WebResource.axd:7068
a.RadWindow._getCalculatedPopupBounds Telerik.Web.UI.WebResource.axd:7097
a.RadWindow.getWindowBounds Telerik.Web.UI.WebResource.axd:6848
reSizeRadeditor
but you don't check if _popupElement exist. In my case because the radwindow is not display, _popupElement is null so i would suggest to add : if (!this._popupElement) return; before this._getCurrentBounds() in the function _getCalculatedPopupBounds
best regards Mathieu