SharePoint and printing the contents of a web part

When you have complex web parts with all kind of navigational structures around then there is often the need with customers to only print the content of that web part, without all surrouding information.Marian Lishman wrote a nice blog post on how to do exactly that. The approach is actually really neat: collect some information on your HTML page by collecting the HTML data from an innerText property of a specified tag, and write the collected content (together with some additional markup if needed) to a new window that you popup, and automatically print the contents of this popup window. This approach would allow you to write headers and footer, and could be extended to print for example everything within your web part zones.