I have tried the following codes but nothing hides the radtab on indexchange

RadTabStrip1.Tabs[1].Visible = false;
                        RadTabStrip1.Tabs[1].Width = 0;
                        RadTabStrip1.Tabs[1].Height = 0;
                        RadTabStrip1.Tabs[1].Attributes.Add("style", "display: none;");