Someone should take all those example functions and make a library out of them.
It’s more or less the goal of Zepto.js http://zeptojs.com
In addition if you’re only using one small part of the JQuery library, it may not be worth the full include to get the job done.
See also now http://shouldipickjquery.com/ and http://youmightneedjquery.com/ :-)
What about other browsers like Firefox and chrome?