jQuery 二级菜单，一次显示一个小类 鼠标点击显示小类

XML/HTML Code
<div class="arrowlistmenu">  
  
<h3 class="menuheader expandable">表单</h3>  
<ul class="categoryitems">  
<li><a href="1/">Horizontal CSS Menus</a></li>  
<li><a href="2/">Vertical CSS Menus</a></li>  
<li><a href="4/">Image CSS</a></li>  
<li><a href="6/">Form CSS</a></li>  
</ul>  
  
<h3 class="menuheader expandable">导航菜单</h3>  
<ul class="categoryitems">  
<li><a href="">CSS Gallery</a></li>  
<li><a href="">Menu Gallery</a></li>  
<li><a href="">Web Design News</a></li>  
<li><a href="">CSS Examples</a></li>  
<li><a href="">CSS Compressor</a></li>  
<li><a href="">CSS Forums</a></li>  
</ul>  
  
<h3 class="menuheader expandable">分页</h3>  
<ul class="categoryitems">  
<li><a href="#" >Free JavaScripts</a></li>  
  
</ul>  
  
</div>  
 
JavaScript Code
<script type="text/javascript">  
  
  
ddaccordion.init({  
    headerclass: "expandable", //Shared CSS class name of headers group that are expandable  
    contentclass: "categoryitems", //Shared CSS class name of contents group  
    revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover"  
    mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover  
    collapseprev: true, //Collapse previous content (so only one open at any time)? true/false   
    defaultexpanded: [0], //index of content(s) open by default [index1, index2, etc]. [] denotes no content  
    onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)  
    animatedefault: false, //Should contents open by default be animated into view?  
    persiststate: true, //persist state of opened contents within browser session?  
    toggleclass: ["", "openheader"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]  
    togglehtml: ["prefix", "", ""], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)  
    animatespeed: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow"  
    oninit:function(headers, expandedindices){ //custom code to run when headers have initalized  
        //do nothing  
    },  
    onopenclose:function(header, index, state, isuseractivated){ //custom code to run whenever a header is opened or closed  
        //do nothing  
    }  
})  
  
  
</script>