CSS+JS竖向折叠菜单_菜单导航特效

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CSS+JS竖向折叠菜单，像WINDOWS资源治理器左侧的菜单一样，点击菜单的标题，会展开本组的所有菜单项，再次点击则封闭菜单，菜单项是基于CSS，因些接近标准菜单，还不错吧？

<html>
<head>
<title>折叠菜单</title>
<style type="text/css">
.mainDiv{
  width:160px;
}
.topItem
{
  width:160px;
  height:22px;
  cursor:pointer;
  background: #467BF2;
  text-decoration: none;
  color: white; 
 
}
.dropMenu
{
  background:#D9D9D9;
  border-top:1px solid #467BF2;
  border-left:1px solid #92B1F8;
  border-right:1px solid #92B1F8;
  border-bottom:1px solid #92B1F8;
}

.subMenu
{
   display:none;
}
.subItem
{
   padding-left:5px;
   cursor:pointer;
   font-weight:bold;
   text-decoration:none;
   color:black;
}

.subItem a
{
   text-decoration:none;
   color:black;
}
.subItemOver
{
   cursor:pointer;
   color:blue;
   text-decoration:underline;
   font-weight:bold;
   padding-left:5px;
}

.subItemOver  a
{
   color:blue;
}
.drop
{
   border-left:1px solid black;
   border-right:1px solid black; 
}
</style>
<script language="javascript">
var TIMER_SLIDE = null;
var OBJ_SLIDE;
var OBJ_VIEW;
var PIX_SLIDE = 10;
var NEW_PIX_VAL;
var DELAY_SLIDE = 30; 
var DIV_HEIGHT = 22; //value irrelevant
var SUB_MENU_NUM =0;
var RE_INIT_OBJ = null;
var bMenu = document.getElementById("curMenu");
var MainDiv,SubDiv

document.write('<div id="tempcontainer" class="mainDiv" style="visibility: hidden; position: absolute"></div>')
function Init(objDiv)
{
 if (TIMER_SLIDE == null)
{
SUB_MENU_NUM = 0;
MainDiv = objDiv.parentNode;
SubDiv =  MainDiv.getElementsByTagName("DIV").item(0);
SubDiv.onclick = SetSlide;
OBJ_SLIDE = MainDiv.getElementsByTagName("DIV").item(1)
OBJ_VIEW = OBJ_SLIDE.getElementsByTagName("DIV").item(0);

document.getElementById("tempcontainer").innerHTML=MainDiv.getElementsByTagName("DIV").item(2).innerHTML    DIV_HEIGHT=document.getElementById("tempcontainer").offsetHeight //DD added code
        for (i=0;i<OBJ_VIEW.childNodes.length;i++)
        {
            if (OBJ_VIEW.childNodes.item(i).tagName == "SPAN")
            {
                SUB_MENU_NUM ++;
                OBJ_VIEW.childNodes.item(i).onmouseover= ChangeStyle;
                OBJ_VIEW.childNodes.item(i).onmouseout= ChangeStyle;
            }
        }   
        NEW_PIX_VAL = parseInt(MainDiv.getAttribute("state")); 
    }

}
function SetSlide()
{   
   if (window.TIMER_SLIDE) clearInterval(TIMER_SLIDE) //DD added code
      if (TIMER_SLIDE == null  &&  this.parentNode == MainDiv)
            TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE);
      else
      {
          RE_INIT_OBJ = this;
          setTimeout('ReInit()', 200);
      }
}

function ReInit(obj)
{
    Init(RE_INIT_OBJ);
    TIMER_SLIDE = setInterval('RunSlide()', DELAY_SLIDE);
    RE_INIT_OBJ = null;
}

function RunSlide()
{

if (OBJ_VIEW.getAttribute("state") == 0)
    {
        NEW_PIX_VAL += PIX_SLIDE;
        OBJ_SLIDE.style.height = NEW_PIX_VAL;

if (NEW_PIX_VAL >= DIV_HEIGHT) //DD modified code
        {
            clearInterval(TIMER_SLIDE);
            TIMER_SLIDE = null;
            OBJ_VIEW.style.display = 'inline';
            OBJ_VIEW.setAttribute("state","1")
            MainDiv.setAttribute("state",NEW_PIX_VAL);
        }
    } else
    {
        OBJ_VIEW.style.display = 'none';
        NEW_PIX_VAL -= PIX_SLIDE;
        
        if(NEW_PIX_VAL > 0)OBJ_SLIDE.style.height = NEW_PIX_VAL;
        if (NEW_PIX_VAL <= 0)
        {
            NEW_PIX_VAL = 0;
            OBJ_SLIDE.style.height = NEW_PIX_VAL
            clearInterval(TIMER_SLIDE);
            TIMER_SLIDE = null;
            OBJ_VIEW.setAttribute("state","0")
            MainDiv.setAttribute("state",NEW_PIX_VAL);
        }
    }
}

function ChangeStyle()
{
    if (this.className == this.getAttribute("classOut"))
        this.className = this.getAttribute("classOver");
    else
        this.className = this.getAttribute("classOut");
}
</script>
</head>
<body>

<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this);" >网页殊效</div>        
<div class="dropMenu" >
 <div class="subMenu" state="0">
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/jscss/sort/list_1_1.shtml">菜单导航</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/jscss/sort/list_2_1.shtml">层和布局</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/jscss/sort/list_3_1.shtml">文字效果</a></span>
 </div>
</div>
</div>

<BR />

<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this)" >源码下载</div>        
<div class="dropMenu" >
 <div class="subMenu" state="0">
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/sort/list_1_1.shtml">ASP源码</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/sort/list_2_1.shtml">PHP源码</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/sort/list_11_1.shtml">AJAX源码</a></span>
 </div>
</div>
</div>

<BR />

<div class="mainDiv" state="0">
<div class="topItem" classOut="topItem" classOver="topItemOver" onMouseOver="Init(this)" >网络编程</div>        
<div class="dropMenu" >
 <div class="subMenu" state="0">
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/">网页设计</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/">艺术创作</a></span><BR />
  <span class="subItem" classOut="subItem" classOver="subItemOver"><a href="/">电脑网络</a></span>
  </div>
</div>
</div>

</body>
</html>

所属频道：菜单导航特效/更新时间：2010-05-22

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