// speed in milliseconds
var scrollSpeed = 40;
// set the default position
var current = 0;
// set the direction
var direction = 'h';
function bgscroll(){
// 1 pixel row at a time
current -= 1;
// move the background with backgrond-position css properties
$('div.visual').css("backgroundPosition", (direction == 'h') ? current+"px 0" : "0 " + current+"px");
}
//Calls the scrolling function repeatedly
setInterval("bgscroll()", scrollSpeed);