Background Image Scroller

Look at the background

Source Code

var backgroundOffset = 0;
var bgObject = eval('document.body');
function scrollBG(maxSize)
{
    backgroundOffset = backgroundOffset + 1;
    if (backgroundOffset > maxSize) backgroundOffset = 0;
    bgObject.style.backgroundPosition = "0 " + backgroundOffset;
}
var ScrollTimer = window.setInterval("scrollBG(307)", 64);