Reflow & Repaint
http://www.phpied.com/rendering-repaint-reflowrelayout-restyle/
http://segmentfault.com/a/1190000002629708
http://blog.csdn.net/notejs/article/details/11379795
http://blog.letitialew.com/post/30425074101/repaints-and-reflows-manipulating-the-dom
https://developers.google.com/speed/articles/reflow
http://www-archive.mozilla.org/newlayout/doc/reflow.html