jQuery(document).ready(function(){

function slidepage13(direction){
var peeker = jQuery("div[@id^=yespage13]");

var classLength = jQuery(peeker).attr("class").length;

if(direction == "left"){
if(parseInt(peeker.attr("class").substring(10,classLength)) == (0)){
jQuery(peeker).attr("id","nopage13");
jQuery(".cellpage1327").attr("id","yespage13");
jQuery(".tubepage13").animate({left: "+=780"},2000, function(){
jQuery(this).css("display","none");})
.animate({left: "-=22620"},"fast", function(){jQuery(this).css("display","block");}).animate({left: "+=780"},2000);}

else{
var classLength = jQuery(peeker).attr("class").length;

var nextLeft = ".cell" + "page13" + (parseInt(jQuery(peeker).attr("class").substring(10,classLength)) - 1);
jQuery(peeker).attr("id","nopage13");
jQuery(nextLeft).attr("id","yespage13");
jQuery(".tubepage13").animate({left: "+=780"},2000);}}

if(direction == "right"){
var peeker = jQuery("div[@id^=yespage13]");
var classLength = jQuery(peeker).attr("class").length;

if(parseInt(peeker.attr("class").substring(10,classLength)) == 27){
jQuery(peeker).attr("id","nopage13");
jQuery(".cellpage130").attr("id","yespage13");
jQuery(".tubepage13").animate({left: "-=780"},2000, function(){jQuery(this).css("display","none");})
.animate({left: "+=22620"},"fast", function(){jQuery(this).css("display","block");}).animate({left: "-=780"},2000);}

else{
var classLength = jQuery(peeker).attr("class").length;

var nextRight = ".cell" + "page13" + (parseInt(jQuery(peeker).attr("class").substring(10,classLength)) + 1);
jQuery(peeker).attr("id","nopage13");
jQuery(nextRight).attr("id","yespage13");
jQuery(".tubepage13").animate({left: "-=780"},2000);}
}}

jQuery(".leftpage13").click(function(){
slidepage13("left");});
jQuery(".rightpage13").click(function(){
slidepage13("right");});
});