The CSS class assigned to disabled tabs in the 15.1 Toolkit differs from previous releases. The "__tab_disabled" class was assigned to the tab previously (a SPAN) and now in v15.1 it gets assigned to the hyperlink. The "__tab_active" class works as it did previously getting assigned to the tab (SPAN). This would seem to me anyhow to be inconsistent behavior.
Version 7.1213 HTML:
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerOld.png)
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerOldHyperlink.png)
Version 15.1 HTML:
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerNew.png)
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerNewHyperlink.png)
Comments: To restore similar functionality from previous releases of the toolkit edit the _makeEnabled function in Tabs.js (or Tabs.debug.js). Replace the line: var hyperlinkId = "__tab_" + this.get_element().id; with var hyperlinkId = this.get_element().id + "_tab"; or in the minimized version: var i=this.get_element().id + "_tab",t
Version 7.1213 HTML:
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerOld.png)
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerOldHyperlink.png)
Version 15.1 HTML:
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerNew.png)
![Image](https://staff.washington.edu/lwrogers/outgoing/AjaxControlToolkit/TabContainerDisabledBug/tabContainerNewHyperlink.png)
Comments: To restore similar functionality from previous releases of the toolkit edit the _makeEnabled function in Tabs.js (or Tabs.debug.js). Replace the line: var hyperlinkId = "__tab_" + this.get_element().id; with var hyperlinkId = this.get_element().id + "_tab"; or in the minimized version: var i=this.get_element().id + "_tab",t