Type.registerNamespace("Sys.Extended.UI.HtmlEditor.ToolbarButtons"); Sys.Extended.UI.HtmlEditor.ToolbarButtons.HorizontalSeparator = function(element) { Sys.Extended.UI.HtmlEditor.ToolbarButtons.HorizontalSeparator.initializeBase(this, [element]); } Sys.Extended.UI.HtmlEditor.ToolbarButtons.HorizontalSeparator.prototype = { isImage: function() { return false; } } Sys.Extended.UI.HtmlEditor.ToolbarButtons.HorizontalSeparator.registerClass("Sys.Extended.UI.HtmlEditor.ToolbarButtons.HorizontalSeparator", Sys.Extended.UI.HtmlEditor.ToolbarButtons.DesignModeImageButton);