Thread:Project:Support desk/How to make lazyload.js work in mediawiki 1.17?

I past following code in MediaWiki:Common.js but no effect at all. I can use two to load jquery.lazyload.js and Contral code in my onw wordpress. But mediawiki only have one MediaWiki:Common.js.

The another js "go to top" work fine with build in jquery.

Anyone know how to make it work ? (Contral code write in the end.)