I find that I can install ajaxcontroltookit (by downloading from codeplex to my local PC), and I can open Visual Studio and create a tab in the left panel and right click and select "choose items" and choose items from the toolkit. I can drag those items onto a form. Generally those items will have a prefix, such as <ajaxcontrolToolkit:Html5Extender>. But now suppose I want to ftp that asp page, with the ajax controls on it, to a web server that has asp.net installed. The webserver is supposed to support ajax as well. How do I know what prefix to use? I assume that the webserver doesn't require me to upload the ajaxcontroltookit, since the basic ajax control are built into the latest versions of asp.net. So I shouldn't use the prefix "ajaxcontrolToolkit". But I tried the prefix "asp:" and that didn't work.
So what should I be doing to get the HTML5extender to work on a website that has Windows 12, and Net 4.5, and the latest asp version?