Javascript is a essential building block of modern web applications. But plain javascript is a pain in the neck, if you have to deal with all the browser quirks and bugs. Enter javascript frameworks, a wrapper that hides inside all the dealings with the browser peculiarities and a way to perform common tasks easily and with little hassle.
Javascript frameworks are around for some years now and have proliferated significantly in the developer communities, but which one seems to prevail, to attract the largest attention and mindshare? A tweet that pointed to a site that made a comparison between jQuery and Mootools, got me thinking. So I turned to Google trends to get an indication. And I think the picture is pretty clear:

jQuery rules the game. Although not as early an entrant as prototype and dojo, it is rising constantly since 2006.
The other frameworks show moderate growth or even decline. Dojo made a spike towards the end of 2007, early 2008 but is in decline ever since.
Also, the results for prototype must be inflated as the word ‘prototype‘ is a common word and the searches cannot be only for the so named javascript framework.
Finally, just for the record, in my query, I had included also mochikit, ASP.Net Ajax framework and Spry but there were no results fo these frameworks.