I happen to come across your forum post. I've attached an application that has an example of closing a tab with an "x" image. Run the attached application, and in the Index.cshtml, under TabStrip, select "Close Tab with Image". The example has documentation that explains what needs to be done. It uses my telerik.extensions.js javascript file that can also be found on CodePlex at: http://telerikmvcextendedjs.codeplex.com/