These bookmarklets let you see how a web page is coded without digging through the source, debug problems in web pages quickly, and experiment with CSS or JS without editing the actual page.
CPAINT (Cross-Platform Asynchronous INterface Toolkit) is a true AJAX (Asynchronous JavaScript XML) and JSRS (JavaScript Remote Scripting) implementation that supports both PHP and ASP/VBscript.
"One of the classic drawbacks to building a web application interface is that once a page has been downloaded to the client, the connection to the server is severed. Any attempt at a dynamic interface involves a full roundtrip of the whole page back to th
J. Böhringer, P. Bühler, and P. Schlaich. X.Media.Press Springer, Berlin ; Heidelberg, 5., vollständig überarbeitete u. erweiterte Aufl. edition, (2011)
K. Schmidt, R. Stühmer, and L. Stojanovic. The 2009 AAAI Spring Symposium on Intelligent Event Processing, page 67--72. Association for the Advancement of Artificial Intelligence, (March 2009)