$(function(){

    	  $('#midground').css({backgroundPosition: '0px 0px'});
    	  $('#foreground').css({backgroundPosition: '0px 0px'});
    	  $('#background').css({backgroundPosition: '0px 0px'});
    	
    		$('#midground').animate({
    			backgroundPosition:"(-10000px 0px)"
    		}, 480000, 'linear');
    		
    		$('#foreground').animate({
    			backgroundPosition:"(-10000px 0px)"
    		}, 340000, 'linear');
    		
    		$('#background').animate({
    			backgroundPosition:"(-10000px 0px)"
    		}, 960000, 'linear');
    		
    	});