jQuery(document).ready(function(){

function slidepage12(direction){
var peeker = jQuery("div[@id^=yespage12]");

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

if(direction == "left"){
if(parseInt(peeker.attr("class").substring(10,classLength)) == (0)){
jQuery(peeker).attr("id","nopage12");
jQuery(".cellpage1223").attr("id","yespage12");
jQuery(".tubepage12").animate({left: "+=780"},2000, function(){
jQuery(this).css("display","none");})
.animate({left: "-=19500"},"fast", function(){jQuery(this).css("display","block");}).animate({left: "+=780"},2000);}

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

var nextLeft = ".cell" + "page12" + (parseInt(jQuery(peeker).attr("class").substring(10,classLength)) - 1);
jQuery(peeker).attr("id","nopage12");
jQuery(nextLeft).attr("id","yespage12");
jQuery(".tubepage12").animate({left: "+=780"},2000);}}

if(direction == "right"){
var peeker = jQuery("div[@id^=yespage12]");
var classLength = jQuery(peeker).attr("class").length;

if(parseInt(peeker.attr("class").substring(10,classLength)) == 23){
jQuery(peeker).attr("id","nopage12");
jQuery(".cellpage120").attr("id","yespage12");
jQuery(".tubepage12").animate({left: "-=780"},2000, function(){jQuery(this).css("display","none");})
.animate({left: "+=19500"},"fast", function(){jQuery(this).css("display","block");}).animate({left: "-=780"},2000);}

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

var nextRight = ".cell" + "page12" + (parseInt(jQuery(peeker).attr("class").substring(10,classLength)) + 1);
jQuery(peeker).attr("id","nopage12");
jQuery(nextRight).attr("id","yespage12");
jQuery(".tubepage12").animate({left: "-=780"},2000);}
}}

jQuery(".leftpage12").click(function(){
slidepage12("left");});
jQuery(".rightpage12").click(function(){
slidepage12("right");});
});