[qwertyuiop]

function animate(id) {
	element=document.getElementById(id);
	start=new Date()
	setTimeout(function() {
		now=new Date() - start;
		progress=now / 100;
		result=-1*progress;
		element.style.backgroundPosition=result+"mm 0mm";
		setTimeout(arguments.callee,1);
	},10);
}