Type.registerNamespace("Sys.Extended.UI.HtmlEditor.ToolbarButtons"); Sys.Extended.UI.HtmlEditor.ToolbarButtons.PreviewMode = function(element) { Sys.Extended.UI.HtmlEditor.ToolbarButtons.PreviewMode.initializeBase(this, [element]); } Sys.Extended.UI.HtmlEditor.ToolbarButtons.PreviewMode.prototype = { } Sys.Extended.UI.HtmlEditor.ToolbarButtons.PreviewMode.registerClass("Sys.Extended.UI.HtmlEditor.ToolbarButtons.PreviewMode", Sys.Extended.UI.HtmlEditor.ToolbarButtons.ModeButton);