I added a webtab to my web form (version 12.1) and then dragged a webscriptmanager to the form. Everything compiles but when I go to run the form I get this error:
Microsoft JScript runtime error: 'Sys' is undefined
Sys.WebForms.PageRequestManager._initialize('ctl00$ContentPlaceHolder1$ScriptManager1', document.getElementById('aspnetForm'));
No matter where I place this code:
<ig:WebScriptManager ID="WebScriptManager1" runat="server"> </ig:WebScriptManager>
I get the error. Could you give me direction on how to fix the error?
NOTE... this only happens when I am running in development mode via vs2010. The error does not occur when running from IE outside of the development environment. Not sure if related but when the page appears, the webtab does not display. What would cause the webtab to not display?
I also verified that all the styles are imported. In vs2010 design the webtab displays. When I run the form it is as though the visible property of the webtab is set to false. The webtab is on a web form that displays in the content area of a master page.