$(document).ready(function(){
});

function scroll(id) {
	var duration = 1500;
	$("#main_page").animate({
		left: "-100%"		
	}, duration);
	$("#page" + id).animate({
		left: "0%"		
	}, duration);
}

function back(id) {
	var duration = 500;
	$("#main_page").css("left", "100%").animate({
		left: "0%"		
	}, duration);
	$("#page" + id).animate({
		left: "100%"		
	}, duration);
}