jQuery 1.8.3, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
Adapted from: http://stackoverflow.com/questions/10600863/overlaying-divs-with-z-index
Writing async code using $.Deferred
This is a simple Bootstrap skeleton. You can fork it to get a ready to use Bootstrap fiddle.
Looking at the difference between encodeURIComponent and encodeURI
Mootools 1.4.5, HTML, CSS, JavaScript