Hello,
My team and me have developped a control using some ajax controls... The main control used is the tabcontainer containing 2-3 tabPanels.
Our control is working perfectly in ie9, firefox, chrome, opera but is not working with ie8. I've tried multiple version of AjaxControlToolkit .NET 3.5 library (Nov. 2011, May 2012, June 2012) expecting each time that this bug has been fixed but the error is still there.
The error is the following one:
Can't move focus to the control because it is invisible, not enabled, or of a type that does not accept the focus
Comments: FrEIIT, there are two issues which can affect how a browser renders things when connecting to a .NET site. One is the rendering engine of the browser (i.e. what the browser does with the code it receives from the server). The other is the User Agent, which affects what HTML asp.net actually sends to the browser. So if testing with the F12 dev tools in IE, make sure you set the Document Mode and User Agent String both to IE8.