Issue with hidden div-jquery - jquery-ui

Question

i'm using jquery hashchange technique for dynamically and smoothly(fadein) loading the contents in a website.Though it's dynamic the url gets changed in the addressbar which looks as follows..as you can see a pound symbol appears before filename.
www.whatever.com/#about.html
www.whatever.com/#contact.html and so on.
In my index page a div named 'folder1' is hidden by default and it's made visible 5seconds after the page is loaded and there is div folder2(check the code).
When you type url 'www.whatever.com' everything works as it should. But when you hit 'home' link it appends # to index.html so url will be whatever.com/#index.html.
And this time div 'folder2' show up right after page is loaded which should be hidden as per the code. I noticed css of those divs gets messed up this time.
I don't understand what's happpening there. Any help?
(function($,i,b){var j,k=$.event.special,c="location",d="hashchange",l="href",f=$.browser,g=document.documentMode,h=f.msie&&(g===b||g<8),e="on"+d in i&&!h;function a(m){m=m||i[c][l];return m.replace(/^[^#]*#?(.*)$/,"$1")}$[d+"Delay"]=100;k[d]=$.extend(k[d],{setup:function(){if(e){return false}$(j.start)},teardown:function(){if(e){return false}$(j.stop)}});j=(function(){var m={},r,n,o,q;function p(){o=q=function(s){return s};if(h){n=$('<iframe src="javascript:0"/>').hide().insertAfter("body")[0].contentWindow;q=function(){return a(n.document[c][l])};o=function(u,s){if(u!==s){var t=n.document;t.open().close();t[c].hash="#"+u}};o(a())}}m.start=function(){if(r){return}var t=a();o||p();(function s(){var v=a(),u=q(t);if(v!==t){o(t=v,u);$(i).trigger(d)}else{if(u!==t){i[c][l]=i[c][l].replace(/#.*/,"")+"#"+u}}r=setTimeout(s,$[d+"Delay"])})()};m.stop=function(){if(!n){r&&clearTimeout(r);r=0}};return m})()})(jQuery,this);
$(function() {
var newHash = "",
$mainContent = $("#main-content"),
$pageWrap = $("#page-wrap"),
baseHeight = 0,
$el;
$pageWrap.height($pageWrap.height());
baseHeight = $pageWrap.height() - $mainContent.height();
$("nav").delegate("a", "click", function() {
window.location.hash = $(this).attr("href");
return false;
});
$(window).bind('hashchange', function(){
newHash = window.location.hash.substring(1);
if (newHash) {
$mainContent
.find("#guts")
.fadeOut(200, function() {
$mainContent.hide().load(newHash + " #guts", function() {
$mainContent.fadeIn(200, function() {
$pageWrap.animate({
height: baseHeight + $mainContent.height() + "px"
});
});
$("nav a").removeClass("current");
$("nav a[href="+newHash+"]").addClass("current");
});
});
};
});
$(window).trigger('hashchange');
});
above makes the entire jquery code.
this is the css.infact there are two divs.
#folder1{
float: left;
height: 100px;
width: 100px;
position: absolute;
top: 15px;
right: 100px;
display: none;
}
#folder2{
float: left;
height: 100px;
width: 100px;
position: absolute;
top: 15px;
right: 100px;
display: show;
}
below is the code usedto hide and show divs.
$(document).ready(function() {
$("#folder2").hide();
setTimeout(function(){
$("#folder1").show();
}, 5000);
setTimeout(function(){
$("#folder1").hide();
}, 10000);
setTimeout(function(){
$("#folder2").show();
}, 15000);
});