Following my referrer links found this blog (I love this whole interlinking stuff!) has some great content and I noticed this posting which links to this tutorial on XmlHttpRequest (the stuff behind AJAX) . Anyway, it’s a great tutorial and it should be fairly easy to change the server side implementation; tutorial uses PHP & MySQL but it really just involves XML processing which is a breeze using ASP.NET – the tricky bit is the Javascript which you CAN use across server side languages…