A user control contains a tabcontainer. When aspx page loads, the user control is not visible. Ajax toolkit script function tries to set focus on tabcontainer and it throws exception : "Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus."
The problem occurs in IE 8 with 11/16/2011 release. It worked OK with sept. release.
Comments: Client\MicrosoftAjax.Extended\Tabs\Tabs.pre.js //Added try catch block _setFocus: function (obj) { try { $get("__tab_" + obj.get_element().id).focus(); } catch (e) { } }, This worked for me. This may not be an ideal solution.
The problem occurs in IE 8 with 11/16/2011 release. It worked OK with sept. release.
Comments: Client\MicrosoftAjax.Extended\Tabs\Tabs.pre.js //Added try catch block _setFocus: function (obj) { try { $get("__tab_" + obj.get_element().id).focus(); } catch (e) { } }, This worked for me. This may not be an ideal solution.