我想弄清楚为什么导航链接不会打开手风琴。我确信只有一些jquery没有正确的语法。我更改了jquery代码中的选择器，现在它不会工作。
我确信这是一个训练有素的眼睛，这应该是一个快速解决方案。
有人可以帮忙吗？
////////////////////////////
// http://www.adipalaz.com/experiments/jquery/accordion.html
///////////////////////////
(function($) {
//http://www.mail-archive.com/jquery-en@googlegroups.com/msg43851.html
$.fn.orphans = function(){
var txt = [];
this.each(function(){$.each(this.childNodes, function() {
if (this.nodeType == 3 && $.trim(this.nodeValue)) txt.push(this)
})});
return $(txt);
};
//http://www.learningjquery.com/2008/02/simple-effects-plugins:
$.fn.fadeToggle = function(speed, easing, callback) {
return this.animate({opacity: 'toggle'}, speed, easing, callback);
};
$.fn.slideFadeToggle = function(speed, easing, callback) {
return this.animate({opacity: 'toggle', height: 'toggle'}, speed, easing, callback);
};
})(jQuery);
////////////////////////////
$(function() {
$('.collapse').hide();
$('.expand').orphans().wrap('');
//demo 4 - div.demo:eq(3) - queued slide effects:
$('div.demo .expand').click(function() {
var $thisCllps = $(this).next('.collapse');
var $cllpsVisible = $(this).ul('.expand').next('.collapse:visible');
($cllpsVisible.length) ? $(this).toggleClass('open').siblings('.expand').removeClass('open')
.next('.collapse:visible').slideUp(400, function() {
$thisCllps.slideDown();
}) : $thisCllps.slideToggle().prev('.expand').toggleClass('open');
return false;
});
});
<div class="demo">
<ul class="collapse" class="ul" style="display: none; ">
<li>Item 1.1.</li>
<li>Item 1.2.</li>
</ul>
<ul class="collapse" class="ul" style="display: none; ">
<li>Item 2.1.</li>
<li>Item 2.2.</li>
</ul>
<ul class="collapse" class="ul" style="display: none; ">
<li>Item 3.1.</li>
<li>Item 3.2.</li>
</ul>
</div>
<ul>
<li>
<h4 class="expand"><a href="#" title="expand/collapse">Slide Up/Down UL 1</a></h4>
</li>
<li>
<h4 class="expand"><a href="#" title="expand/collapse">Slide Up/Down UL 2</a></h4>
</li>
<li>
<h4 class="expand"><a href="#" title="expand/collapse">Slide Up/Down UL 3</a></h4>
</li>
</ul>