Zee WebLayout creates nested, DIV-based split panels. Appearances and behaviors of the panels can be flexibly customized. Zee WebLayout is a highly useful generic WebForm panels layout tool. You will never again need to struggle with CSS hacks and scripts just to create a simple layout of 100% height with header and footer. Of course, you can create more complex layouts with Zee WebLayout. Features: DIV-based panels. Horizontal / Vertical split orientation. Multiple fixed-size/auto-fill panels in a container. Multiple levels of nested containers. Container resizes with browser window. Support for full browser window height/width. IFRAME in a panel. Constraints on panel sizes: min/max/step sizes. Panel states, and positions of scrollbars persist across postbacks. Server-side event for panel state change. Customizable via CSS, Themes, and object properties. Support margins, borders, and padding. Support background color, background image. ASP.NET 2.0 Themes support. Works with Microsoft ASP.NET AJAX. Customized UpdatePanel for better programmatic access and design-time support. Panel state and size updatable via AJAX postback, even panel is not an UpdatePanel. Selected panel properties accessible with JavaScript. Client-side events for panel resize or state change. Panels and their contents can be created dynamically at run-time. Panel sequence can be rearranged at run-time. Excellent design-time support for Visual Studio 2005/2008. In Design View, server controls can be drag-and-dropped to panels, and contents can be visually edited in the same way as the default .NET Panel class. Supports all major browsers, and various modes (quirks/strict).