The bgStretcher plugin allows you to add an image to the background of your page or any element inside of the page. bgStretcher will automatically adjust size of the background image to fill the area of the target element with a proportionally resized image.
This demonstration shows how bgStretcher works in simple slideshow mode. Resize your browser window to view how the image will proportionally adjust to the size of the window.
bgStretcher inside of a DIV element