当加载带有hastags的动态内容-URI时，Jquery-悬停效果不起作用

我目前在一个网站的前端工作。我使用jquery是为了创建一个动态内容。

我的问题是，当我键入我的URI（localhost/jquery/myfile/）并加载index.php时，我的jquery脚本可以工作，但当我点击导航栏并将#index.php放置在URI（localhost/jquery/myfile/#index.php）中时，我有一个js脚本，即具有悬停效果的脚本，不工作（但我所有其他的js文件都可以工作，比如我的nav菜单脚本，它也包括悬停效果）。

我进行了研究，发现当加载新的URI时，悬停效果会停止工作。

index.php

<section id="main-content">
<div id="guts">
    <div id="items">
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span style="display: none;" class="caption">8 Extremely </span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">8 Amazing Javascript Experiments of Physic and Gravity Simulation</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">8 Incredible Wordpress Plugins</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">9 Web CSS Tools You Must Know</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span style="display: none;" class="caption">10 Image Galleries jQuery Script with Thumbnail Filmstrip</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span style="display: none;" class="caption">Single Page Websites With Creative Javascript Effects</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">13 Simple but Useful Online Tools for Web Development</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">8 Ways to Increase the Readibility and Beautify your HTML Code</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">12 Insanely Awesome Javascript Effects</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span style="display: none;" class="caption">10 New jQuery Plugins You Have to Know</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">20 Firefox Plug-ins for Web Designers and Developers</span></a>
        <a style="opacity: 1;" class="item" href="#" title="">
        <img src="#" width="190" height="120">
        <span class="caption">12 Amazing and Creative Javascript Games</span></a>
    </div>
</div>
</section>

ext.js

$(document).ready(function () {
//loop through all the children in #items
//save title value to a span and then remove the value of the title to avoid tooltips
$('#items .item').each(function () {
    title = $(this).attr('title');
    $(this).append('<span class="caption">' + title + '</span>');  
    $(this).attr('title','');
});
$('#items .item').hover(
    function () {
        //set the opacity of all siblings
        $(this).siblings().css({'opacity': '0.2'});
        //set the opacity of current item to full, and add the effect class
        $(this).css({'opacity': '1.0'}).addClass('effect');
        //show the caption
        $(this).children('.caption').show();   
    },
    function () {
        //hide the caption
        $(this).children('.caption').hide();       
    }
);
$('#items').mouseleave(function () {
    //reset all the opacity to full and remove effect class
    $(this).children().fadeTo('100', '1.0').removeClass('effect');     
});   
});

dynamicpage.js

$(document).ready(function () {

$(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');
});
});

如果你能帮我找出为什么会发生这种事，我将不胜感激。

提前感谢，哈里斯21

*edit:*我的动态菜单工作正常，问题是ext.js脚本不工作。