Jquery：当鼠标悬停在菜单项上时，显示文本

发布于 2024-08-01 15:23:58 字数 11045 浏览 8 评论 0原文

我是 JQuery 新手，但希望在我正在构建的网站中使用它。

当用户将鼠标悬停在带有 li 类 hovertriggerssubhead 的菜单中的项目上时，我想在其下方显示一些文本，位于 div 中（嵌套在 li 内），id 为NavSubhead。我已经看过几个这样的例子，即 JQuery 文档常见问题解答中的说明书和 JQuery 站点本身的代码。

这是我的 HTML 代码：

<div id="Navigation">
<ul>

<li class="current">
<a href="index.html">Home</a></li>

<li class="hovertriggerssubhead">
<a href="gallery.html">Gallery</a>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
</li>

<li class="hovertriggerssubhead">

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
<a href="contact.html">Contact</a></li>

</ul>
</div>

我在 JQuery 代码中尝试了两种方法来完成此任务；它们如下：

$(document).ready(function() {

//first method
$(".NavSubhead").hide();

$('#Navigation li').hover(
            function(){$(this).find('div.NavSubhead:hidden').fadeIn(500);},
            function(){$(this).find('div.NavSubhead:visible').fadeOut(500);}
        );


//second method 
    $("#Navigation li div").hide(); 

    $("#Navigation li.hovertriggerssubhead").hover(
        function () {
        $(this).children("div.NavSubhead").show();
        },function(){
        $(this).children("div.NavSubhead").hide();
    });//hover

});// document ready

任何帮助将不胜感激。谢谢！

更新：我尝试了很多答案，甚至有一个可以运行的演示，但它仍然不起作用，这很奇怪。由于包含表格，它是否可能与导航 html 的约束相关？桌子有固定的宽度。除此之外，我不知道是什么问题，JQuery 引用正确。提前致谢！

更新#2：由于我的 HTML 存在一些奇怪的限制，这可能无法正常工作，因此我将其发布在这里。正如您在下面看到的，我也在使用这个幻灯片框架。

<html>
<head>
<title>MZ Photography</title>

<!-- Jquery Stuff -->

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript">

/*

$(function() {

  $("div.NavSubhead").hide();

 $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  );

});
*/



$(function() {

/* hacky nav highlighting */
var loc = window.location.href;
//strip the existing current state
$('#Navigation .current').removeClass('current');

//add class to current section...
//Home
if(loc.indexOf('MZPhotography.html') > -1){
       $('#Navigation #home').addClass('current');
}
//Gallery
else if(loc.indexOf('gallery') > -1){
       $('#Navigation #gallery').addClass('current');
}
//Contact
else if(loc.indexOf('contact.html') > -1){
       $('#Navigation #contact').addClass('current');
}



});

$(document).ready(function() {



  $("div.NavSubhead").hide();

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  ); 







});


</script>


<!-- End jquery stuff -->


<!-- Slideshow stuff begins here -->


<link rel="stylesheet" type="text/css" href="css/slideshow.css" media="screen" />
    <script type="text/javascript" src="js/mootools.js"></script>
    <script type="text/javascript" src="js/slideshow.js"></script>
    <script type="text/javascript">     
    //<![CDATA[
      window.addEvent('domready', function(){
        var data = {
          '30.jpg': { caption: '' }, 
          '25.jpg': { caption: '' }, 
          '21.jpg': { caption: '' }, 
          '16.jpg': { caption: '' },
          '11.jpg': { caption: '' },
          '13.jpg': { caption: '' },
          '12.jpg': { caption: '' },
          '9.jpg': { caption: '' },
          '4.jpg': { caption: '' },
          '2.jpg': { caption: '' },
          '3.jpg': { caption: '' },
          '6.jpg': { caption: '' },
          '7.jpg': { caption: '' },
          '14.jpg': { caption: '' },
          '8.jpg': { caption: '' },
          '10.jpg': { caption: '' },
          '15.jpg': { caption: '' },
          '17.jpg': { caption: '' },
          '22.jpg': { caption: '' },
          '28.jpg': { caption: '' },
          '26.jpg': { caption: '' },
          '27.jpg': { caption: '' },
          '24.jpg': { caption: '' },
          '23.jpg': { caption: '' },
          '19.jpg': { caption: '' },
          '18.jpg': { caption: '' },
          '20.jpg': { caption: '' },
          '29.jpg': { caption: '' },
          '31.jpg': { caption: '' },
          '32.jpg': { caption: '' },
          '1.jpg': { caption: '' },
          '5.jpg': { caption: '' },
          '33.jpg': { caption: '' },
          '34.jpg': { caption: '' },
          '35.jpg': { caption: '' },
          '36.jpg': { caption: '' }



        };
        var myShow = new Slideshow('show', data, {controller: true, height: 450, hu: 'images/', thumbnails: false, width: 600});
      });
    //]]>
    </script>


    <!-- end Slideshow -->

<link rel="stylesheet" href="site.css">

</head>
<body>

<table width="980"> <!--980 -->

<tr>

<td width="880">

<table width="880"> <!--880-->

<tr>

<td align="left">
<div id="logo">
<img src="images/title.png" />
</div>
</td>

<td align="right"><!--MENU-->
<div id="Navigation">
<ul>

<li id="home" class="current">
<a href="#top">Home</a></li>

<li id="gallery" class="hovertriggerssubhead">
<a href="gallery.html">Gallery</a>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
</li>

<li id="contact" class="hovertriggerssubhead">
<a href="contact.html">Contact</a></li>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 

</ul>
</div>
</td>
</tr>
</table>

<table width="700">
<tr><td><br></td></tr>
<tr>
<!-- we don't rly need this -->
<!-- How about about section here? -->

<td align="left" id="tdAbout">

<!--Recent Changes --> <!-- NM -->
<div id="aboutDiv">
<p class="yellowboxtransparent" id="about">
Welcome to MZ's personal photography site. Here, you will find galleries of some of his photos, by pressing the Galleries link at the top right hand side of the page. Enjoy!

</p>
</div>

<!-- About --> </td>
<td>&nbsp;&nbsp;</td>
<td align="center">

<!--Slideshow-->
<div align="center" id="show" class="slideshow">
    <img src="images/1.jpg" alt="" />
  </div>

</td>
<td align="right">
</td>
</tr>

<tr><td><br><br></td></tr>

<tr><!--<td align="left"> -->

<!--Copyright Statement-->
<!--<p class="copy">&copy; Copyright 2009 by MZ. <br/>All Rights Reserved. </p>

</td><td align="right"><!--Links--><!--</td>--></tr></table>
</td>
<td><!--Right hand column -->
<div id="meDiv">
<p class="blueboxtransparent">

hi

</p>
</div>
</td>
</tr>
</table>
<br/><br/><br/><br/><br/>
<!-- Beneath -->

<div id="bottom">

<div class="leftfloat" id="divCopy">
<!--Copyright Statement-->
<p class="copy">&copy; Copyright 2009 by MZ. All Rights Reserved. </p>
</div>
<div class="rightfloat" id="divLinks">

<ul id="linklist">
<li><a href="http://absolutely2nothing.wordpress.com">Blog</a></li>
<li><a href="http://twitter.com/maximz2005">Twitter - @maximz2005</a></li>

</ul>


</div>


</div>
</body>
</html>

下面是我的 css，位于 site.css 中。

/* CSS for MZ Photography site. Coypright 2009 by MZ, All Rights Reserved. */

p.copy { color:#ffffff; font-face:Helvetica,Calibri,Arial; font-size:12; font-style:italic;}

.leftfloat { float: left; }

.rightfloat { float: right; }

body {
font: 12px/1.5 Helvetica, Arial, "Lucida Grande", "Lucida Sans Unicode", Tahoma, sans-serif!important;
color: #ffffff;
background: #000000; }

#about { color: #3399FF; } /* #666 */

h1 { font: Helvetica, "Comic Sans MS", "Arial Rounded MT Bold", Tahoma, "Times New Roman"; font-size: 32pt; color: #339; }

h2 { font: Helvetica, Arial; font-size: 18pt; color: #666; }

a.hover { background-color:#666; color:#ffffff; }

#tdAbout { width:25 }

#nav { float:right }

#linklist
{
font-family: Calibri, Helvetica, Comic Sans MS, Arial, sans-serif;
list-style-type:circle;
white-space:nowrap;
}

#linklist li
{
display:inline


}


/* Warnings/Alerts */
.warning, .alert, .yellowbox {
padding: 6px 9px;
background: #fffbbc;
border: 1px solid #E6DB55;
}

.yellowboxtransparent, .warningtransparent, .alerttransparent { 
padding:6px 9px;
border: 1px solid #E6DB55;
}

/* Errors */
.error, .redbox {
padding: 6px 9px;
background: #ffebe8;
border: 1px solid #C00;
}

.redboxtransparent, .errortransparent{
padding: 6px 9px;
border: 1px solid #C00;
}

/* Downloads */
.download, .greenbox {
padding: 6px 9px;
background: #e7f7d3;
border: 1px solid #6c3;
}

.greenboxtransparent, .downloadtransparent {
padding: 6px 9px;
border: 1px solid #6c3;
}

/*Info Box */
.bluebox, .info{
padding: 6px 9px;
background: #FFFF33;
border: 2px solid #3399FF;
color: 000000;
}

.blueboxtransparent, .infotransparent{
padding: 6px 9px;
border: 1px solid #3399FF;
}

a:link {
COLOR: #DC143C; /* #0000FF */
}
a:visited {
COLOR: #DC143C; /* #800080 */
}
a:hover { color: #ffffff; background-color: #00BFFF; }
}
a:active { color: #ffffff; background-color: #00BFFF; }




/*Navigation*/
#Navigation {
float: right;
background: #192839 url(images/bg_nav_left.gif) left bottom no-repeat;
}

#Navigation ul {
float: left;
background: url(images/bg_nav_right.gif) right bottom no-repeat;
padding: 0 .8em 2px;
margin: 0;
}
#Navigation li {
float: left;
list-style: none;
margin: 0;
background: none;
padding: 0;
}
#Navigation li a {
float: left;
padding: 0 1em;
line-height: 25px;
font-size: 1.2em;
color: #D0D0D0;
text-decoration: none;
margin-bottom: 2px;
}
#Navigation li.current a, #Navigation li.current a:hover {
    border-bottom: 2px solid #176092;
    background: #192839;
    margin-bottom: 0;
    cursor: default;
    color: #D0D0D0;
}
#Navigation li a:hover {
color: #fff;
border-bottom: 2px solid #4082ae;
margin-bottom: 0;
}

#Navigation li.current a, #Navigation li.current a:hover {
    border-bottom: 2px solid #176092;
    background: #192839;
    margin-bottom: 0;
    cursor: default;
    color: #D0D0D0;
}

预先非常感谢您的所有帮助！

原文

I'm new to JQuery, but wish to use it in a site that I'm building.

When the user mouses over an item in the menu with li class hovertriggerssubhead, I want to display some text below it, located in the div (nested inside the li) with id NavSubhead. I have looked at several examples of this, namely in the cookbook in the FAQ of the JQuery documentation and the code of the JQuery site itself.

This is my HTML code:

<div id="Navigation">
<ul>

<li class="current">
<a href="index.html">Home</a></li>

<li class="hovertriggerssubhead">
<a href="gallery.html">Gallery</a>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
</li>

<li class="hovertriggerssubhead">

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
<a href="contact.html">Contact</a></li>

</ul>
</div>

I tried two methods of accomplishing this in my JQuery code; they are below:

$(document).ready(function() {

//first method
$(".NavSubhead").hide();

$('#Navigation li').hover(
            function(){$(this).find('div.NavSubhead:hidden').fadeIn(500);},
            function(){$(this).find('div.NavSubhead:visible').fadeOut(500);}
        );


//second method 
    $("#Navigation li div").hide(); 

    $("#Navigation li.hovertriggerssubhead").hover(
        function () {
        $(this).children("div.NavSubhead").show();
        },function(){
        $(this).children("div.NavSubhead").hide();
    });//hover

});// document ready

Any help would be appreciated. Thanks!

UPDATE: I've tried numerous answers, even one with a working demo, but it still doesn't work, which is very weird. Could it be related by any chance to constraints of the navigation html because of an encompassing table? The table has a fixed width. Other than that, I don't know what is the problem, and JQuery is referenced correctly. Thanks in advance!

UPDATE #2: As it's possible that this is not working because of some weird constraints in regards to my HTML, I'm going to post it here. As you can see below, I'm using this Slideshow framework too.

<html>
<head>
<title>MZ Photography</title>

<!-- Jquery Stuff -->

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript">

/*

$(function() {

  $("div.NavSubhead").hide();

 $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  );

});
*/



$(function() {

/* hacky nav highlighting */
var loc = window.location.href;
//strip the existing current state
$('#Navigation .current').removeClass('current');

//add class to current section...
//Home
if(loc.indexOf('MZPhotography.html') > -1){
       $('#Navigation #home').addClass('current');
}
//Gallery
else if(loc.indexOf('gallery') > -1){
       $('#Navigation #gallery').addClass('current');
}
//Contact
else if(loc.indexOf('contact.html') > -1){
       $('#Navigation #contact').addClass('current');
}



});

$(document).ready(function() {



  $("div.NavSubhead").hide();

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  ); 







});


</script>


<!-- End jquery stuff -->


<!-- Slideshow stuff begins here -->


<link rel="stylesheet" type="text/css" href="css/slideshow.css" media="screen" />
    <script type="text/javascript" src="js/mootools.js"></script>
    <script type="text/javascript" src="js/slideshow.js"></script>
    <script type="text/javascript">     
    //<![CDATA[
      window.addEvent('domready', function(){
        var data = {
          '30.jpg': { caption: '' }, 
          '25.jpg': { caption: '' }, 
          '21.jpg': { caption: '' }, 
          '16.jpg': { caption: '' },
          '11.jpg': { caption: '' },
          '13.jpg': { caption: '' },
          '12.jpg': { caption: '' },
          '9.jpg': { caption: '' },
          '4.jpg': { caption: '' },
          '2.jpg': { caption: '' },
          '3.jpg': { caption: '' },
          '6.jpg': { caption: '' },
          '7.jpg': { caption: '' },
          '14.jpg': { caption: '' },
          '8.jpg': { caption: '' },
          '10.jpg': { caption: '' },
          '15.jpg': { caption: '' },
          '17.jpg': { caption: '' },
          '22.jpg': { caption: '' },
          '28.jpg': { caption: '' },
          '26.jpg': { caption: '' },
          '27.jpg': { caption: '' },
          '24.jpg': { caption: '' },
          '23.jpg': { caption: '' },
          '19.jpg': { caption: '' },
          '18.jpg': { caption: '' },
          '20.jpg': { caption: '' },
          '29.jpg': { caption: '' },
          '31.jpg': { caption: '' },
          '32.jpg': { caption: '' },
          '1.jpg': { caption: '' },
          '5.jpg': { caption: '' },
          '33.jpg': { caption: '' },
          '34.jpg': { caption: '' },
          '35.jpg': { caption: '' },
          '36.jpg': { caption: '' }



        };
        var myShow = new Slideshow('show', data, {controller: true, height: 450, hu: 'images/', thumbnails: false, width: 600});
      });
    //]]>
    </script>


    <!-- end Slideshow -->

<link rel="stylesheet" href="site.css">

</head>
<body>

<table width="980"> <!--980 -->

<tr>

<td width="880">

<table width="880"> <!--880-->

<tr>

<td align="left">
<div id="logo">
<img src="images/title.png" />
</div>
</td>

<td align="right"><!--MENU-->
<div id="Navigation">
<ul>

<li id="home" class="current">
<a href="#top">Home</a></li>

<li id="gallery" class="hovertriggerssubhead">
<a href="gallery.html">Gallery</a>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 
</li>

<li id="contact" class="hovertriggerssubhead">
<a href="contact.html">Contact</a></li>

<div class="NavSubhead">
<p class="navsubheadtext">Under Construction</p>
</div> 

</ul>
</div>
</td>
</tr>
</table>

<table width="700">
<tr><td><br></td></tr>
<tr>
<!-- we don't rly need this -->
<!-- How about about section here? -->

<td align="left" id="tdAbout">

<!--Recent Changes --> <!-- NM -->
<div id="aboutDiv">
<p class="yellowboxtransparent" id="about">
Welcome to MZ's personal photography site. Here, you will find galleries of some of his photos, by pressing the Galleries link at the top right hand side of the page. Enjoy!

</p>
</div>

<!-- About --> </td>
<td>  </td>
<td align="center">

<!--Slideshow-->
<div align="center" id="show" class="slideshow">
    <img src="images/1.jpg" alt="" />
  </div>

</td>
<td align="right">
</td>
</tr>

<tr><td><br><br></td></tr>

<tr><!--<td align="left"> -->

<!--Copyright Statement-->
<!--<p class="copy">© Copyright 2009 by MZ. <br/>All Rights Reserved. </p>

</td><td align="right"><!--Links--><!--</td>--></tr></table>
</td>
<td><!--Right hand column -->
<div id="meDiv">
<p class="blueboxtransparent">

hi

</p>
</div>
</td>
</tr>
</table>
<br/><br/><br/><br/><br/>
<!-- Beneath -->

<div id="bottom">

<div class="leftfloat" id="divCopy">
<!--Copyright Statement-->
<p class="copy">© Copyright 2009 by MZ. All Rights Reserved. </p>
</div>
<div class="rightfloat" id="divLinks">

<ul id="linklist">
<li><a href="http://absolutely2nothing.wordpress.com">Blog</a></li>
<li><a href="http://twitter.com/maximz2005">Twitter - @maximz2005</a></li>

</ul>


</div>


</div>
</body>
</html>

The below is my css, in site.css.

/* CSS for MZ Photography site. Coypright 2009 by MZ, All Rights Reserved. */

p.copy { color:#ffffff; font-face:Helvetica,Calibri,Arial; font-size:12; font-style:italic;}

.leftfloat { float: left; }

.rightfloat { float: right; }

body {
font: 12px/1.5 Helvetica, Arial, "Lucida Grande", "Lucida Sans Unicode", Tahoma, sans-serif!important;
color: #ffffff;
background: #000000; }

#about { color: #3399FF; } /* #666 */

h1 { font: Helvetica, "Comic Sans MS", "Arial Rounded MT Bold", Tahoma, "Times New Roman"; font-size: 32pt; color: #339; }

h2 { font: Helvetica, Arial; font-size: 18pt; color: #666; }

a.hover { background-color:#666; color:#ffffff; }

#tdAbout { width:25 }

#nav { float:right }

#linklist
{
font-family: Calibri, Helvetica, Comic Sans MS, Arial, sans-serif;
list-style-type:circle;
white-space:nowrap;
}

#linklist li
{
display:inline


}


/* Warnings/Alerts */
.warning, .alert, .yellowbox {
padding: 6px 9px;
background: #fffbbc;
border: 1px solid #E6DB55;
}

.yellowboxtransparent, .warningtransparent, .alerttransparent { 
padding:6px 9px;
border: 1px solid #E6DB55;
}

/* Errors */
.error, .redbox {
padding: 6px 9px;
background: #ffebe8;
border: 1px solid #C00;
}

.redboxtransparent, .errortransparent{
padding: 6px 9px;
border: 1px solid #C00;
}

/* Downloads */
.download, .greenbox {
padding: 6px 9px;
background: #e7f7d3;
border: 1px solid #6c3;
}

.greenboxtransparent, .downloadtransparent {
padding: 6px 9px;
border: 1px solid #6c3;
}

/*Info Box */
.bluebox, .info{
padding: 6px 9px;
background: #FFFF33;
border: 2px solid #3399FF;
color: 000000;
}

.blueboxtransparent, .infotransparent{
padding: 6px 9px;
border: 1px solid #3399FF;
}

a:link {
COLOR: #DC143C; /* #0000FF */
}
a:visited {
COLOR: #DC143C; /* #800080 */
}
a:hover { color: #ffffff; background-color: #00BFFF; }
}
a:active { color: #ffffff; background-color: #00BFFF; }




/*Navigation*/
#Navigation {
float: right;
background: #192839 url(images/bg_nav_left.gif) left bottom no-repeat;
}

#Navigation ul {
float: left;
background: url(images/bg_nav_right.gif) right bottom no-repeat;
padding: 0 .8em 2px;
margin: 0;
}
#Navigation li {
float: left;
list-style: none;
margin: 0;
background: none;
padding: 0;
}
#Navigation li a {
float: left;
padding: 0 1em;
line-height: 25px;
font-size: 1.2em;
color: #D0D0D0;
text-decoration: none;
margin-bottom: 2px;
}
#Navigation li.current a, #Navigation li.current a:hover {
    border-bottom: 2px solid #176092;
    background: #192839;
    margin-bottom: 0;
    cursor: default;
    color: #D0D0D0;
}
#Navigation li a:hover {
color: #fff;
border-bottom: 2px solid #4082ae;
margin-bottom: 0;
}

#Navigation li.current a, #Navigation li.current a:hover {
    border-bottom: 2px solid #176092;
    background: #192839;
    margin-bottom: 0;
    cursor: default;
    color: #D0D0D0;
}

Thanks so much in advance for all your help!

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花辞树 2024-08-08 15:23:58

这对我有用。不过，您的标记可能应该保持一致，并且在两种情况下都将隐藏文本显示在其关联链接之后。

$(document).ready(function()
{
    $('.NavSubhead').hide();

    $('li.hovertriggerssubhead').hover(
        function()
        {
            $('.NavSubhead', $(this)).show();
        },
        function()
        {
            $('.NavSubhead', $(this)).hide();
        }
    );
});

This worked for me. You should probably be consistent in your markup though and have the hidden text appear after its associated link in both cases.

$(document).ready(function()
{
    $('.NavSubhead').hide();

    $('li.hovertriggerssubhead').hover(
        function()
        {
            $('.NavSubhead', $(this)).show();
        },
        function()
        {
            $('.NavSubhead', $(this)).hide();
        }
    );
});

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破晓 2024-08-08 15:23:58

我还没有测试过这个，但我认为它应该有效：

$(document).ready(function() {

  //first method
  $(".NavSubhead").hide();

  $('#Navigation li').hover(
    function(){$('div.NavSubhead', this).fadeIn(500);},
    function(){$('div.NavSubhead', this).fadeOut(500);}
  );
}

I haven't tested this, but I think it should work:

$(document).ready(function() {

  //first method
  $(".NavSubhead").hide();

  $('#Navigation li').hover(
    function(){$('div.NavSubhead', this).fadeIn(500);},
    function(){$('div.NavSubhead', this).fadeOut(500);}
  );
}

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东北女汉子 2024-08-08 15:23:58

工作演示

jQuery 代码

$(function() {

  $("div.NavSubhead").hide();

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).fadeIn(500);},
    function(){$(this).next().stop(false, true).fadeOut(500);}
  );

});

NB 我添加了一个单击事件处理程序以防止演示中锚元素的默认操作也是如此

您可能还想在 fade< 之前链接 slideDown() 和 slideUp() /code> 命令分别在每个事件处理程序中，使动画更流畅

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  );

您可能还想看看 jQuery 手风琴，它基本上完成了您在这里所做的事情，但也有一些附加选项。

编辑：

在您的两次更新之后，我知道问题是什么。您使用的幻灯片插件适用于 Mootools JavaScript 框架。此处提供的代码适用于 jQuery JavaScript 框架。虽然可以在站点的同一页面上使用这两个框架，但这两个框架都会向 $ 分配一个对象以用于选择，并且每种情况下的对象都有不同的方法、属性等。因此，为了让两个框架同时工作，我们需要避免这种冲突。幸运的是，jQuery 有一个命令可以轻松解决这个问题，noConflict() ，这将释放 $ 简写，以便其他框架可以使用它。请特别注意它必须包含在页面中的顺序。

因此，为了使代码正常工作，脚本的结构需要如下所示

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript">
    // you can assign the jQuery object to another name if you want. Just
    // use var $j = jQuery.noConflict() and then can use $j() for jQuery object.
    jQuery.noConflict(); 

    // now your jQuery stuff comes here
    // there are a couple of techniques that can be used so that you can use the $
    // shorthand with jQuery library. I'll show you one here using a self-invoking
    // anonymous function that takes one parameter, $, into which we will pass the
    // the jQuery object

    (function($) {
      $(function() {

        $("div.NavSubhead").hide();

        $('#Navigation li a').hover(
            function(){$(this).next().stop(false, true).fadeIn(500);},
            function(){$(this).next().stop(false, true).fadeOut(500);}
        );

      });
    })(jQuery); 

    // now put the Mootools script and relevant slideshow script.
    <script src="....." ></script>

    ....

有大量出色的 jQuery 幻灯片和灯箱插件，它们提供与您链接到的 Mootools 类似的效果。

我认为，除非对于某些特定的功能需求绝对必要，否则我坚持在我的网站中仅使用一个 JavaScript 框架。这不仅可以避免冲突，而且通常可以在一个框架中内置一些方法来实现另一个框架的功能。即使框架不具有作为核心库一部分的功能，框架也被设计为可扩展的，因此具有一种允许开发插件和扩展功能以满足需求的体系结构。

Working Demo

jQuery code

$(function() {

  $("div.NavSubhead").hide();

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).fadeIn(500);},
    function(){$(this).next().stop(false, true).fadeOut(500);}
  );

});

N.B. I have added a click event handler to prevent the default action on anchor elements in the demo too

You may also want to chain in a slideDown() and slideUp() before the fade command in each event handler, respectively, to make the animation smoother

  $('#Navigation li a').hover(
    function(){$(this).next().stop(false, true).slideDown().fadeIn(500);},
    function(){$(this).next().stop(false, true).slideUp().fadeOut(500);}
  );

You may also want to take a look at the jQuery accordion, which essentially does what you are doing here, but has some additional options too.

EDIT:

After both of your updates, I know what the problem is. The slideshow plugin that you are using is for the Mootools JavaScript framework. The code supplied here is for the jQuery JavaScript framework. Whilst it is fine to use both frameworks on your site on the same page, both frameworks assign an object to $ to use for selection, and the object in each case has different methods, properties, etc. So, to get both frameworks to work at the same time we need to avoid this conflict. Luckily, jQuery has a command to easily get around this, noConflict(), which will release the $ shorthand so that other frameworks can use it. Take particular note of the order in which it must be included in a page.

So to get the code working, the structure of the scripts will need to be as follows

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>

<script type="text/javascript">
    // you can assign the jQuery object to another name if you want. Just
    // use var $j = jQuery.noConflict() and then can use $j() for jQuery object.
    jQuery.noConflict(); 

    // now your jQuery stuff comes here
    // there are a couple of techniques that can be used so that you can use the $
    // shorthand with jQuery library. I'll show you one here using a self-invoking
    // anonymous function that takes one parameter, $, into which we will pass the
    // the jQuery object

    (function($) {
      $(function() {

        $("div.NavSubhead").hide();

        $('#Navigation li a').hover(
            function(){$(this).next().stop(false, true).fadeIn(500);},
            function(){$(this).next().stop(false, true).fadeOut(500);}
        );

      });
    })(jQuery); 

    // now put the Mootools script and relevant slideshow script.
    <script src="....." ></script>

    ....

There are plenty of great slideshow and lightbox plugins for jQuery that offer similar effects to the Mootools one that you have linked to.

I'm of the opinion that, unless absolutely necessary for some specific functional need, I stick to using just one JavaScript framework in my site. Not only does this avoid conflicts, but there are usually ways built into a framework of achieving what another framework does. Even if a framework does not have that functionality as part of the core library, frameworks are designed to be extensible and as such, have an architecture that allows one to develop plugins and extend functionality to fit ones needs.

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