/* トップページ スライダー 
	------------------------------------------------------*/


$(function(){



$('#container_area').css({backgroundPositionY:'0'});
	var count=0;
	var posiy='+=-290';
	
	setInterval(function(){
	
	count=count+1;
		if(count<=3){

//firefox
			if(jQuery.browser.mozilla){
					$('#container_area') .animate({backgroundPosition: '0 0'}, {duration:2400}) .animate({backgroundPosition: '0 -290px'}, {duration:2400}).animate({backgroundPosition: '0 -580px'}, {duration:2400}).animate({backgroundPosition: '0 -870px'}, {duration:2400});
			}else{
				$('#container_area').animate({backgroundPositionY:posiy},{duration:1500});
			}
		}
	},3000);
		
});