This is a jquery plugin that add arrows to show the hide parts of the background. Calculate landscape and portrait position.
Is this plugin useful ? mmm maybe not, but it sounded like a great idea in my head back in time. :)
Well .. if you want to use it here it is
Example : http://saulburgos.com/apps/smartbg/ (click on the image to show the arrows and resize the browser if you want)
Options:
imgBg: url background
showArrow: if you want show arrows
keepVisible: arrows never disappear
Depencies: Bootstrap 3.1.1 , jquery 1.9.1