var scrollSpeed = 70;
		var current = 0; //position
		var direction = 'h';

		function bgscroll(){
	    	// 1 pixel row at a time
		    current -= 1;
	   	    $('div#clouds').css("backgroundPosition", (direction == 'h') ? current+"px 0" : "0 " + current+"px");
	   	}
	
		setInterval("bgscroll()", scrollSpeed);