JS代码实现类似QQ主界面的菜单

2012-11-02 来源：网络

【实例名称】

JS代码实现类似QQ主界面的菜单

【实例描述】

QQ主界面其实是C/S实现的菜单。本例通过JavaScript实现一个弹出式的菜单．效果与QQ主界面类似。

【实例代码】

 
<html>
<head>
<meta http-equiv="Content-Type" 
content="text/html; charset=gb2312">
<script language="JavaScript">
var titleHeight = 22;    //标题的高度
var bodyHeight = 160;    //菜单内容项的高度
var groupcount = 4;      //组的个数
var step = 3;          //移动速度
//显示菜单的内容
function showDiv(obj1, obj2)
{
    //以下循环为改变标题的背景颜色
    for(i=0;i<document.all.tags("td").length;i++)
    {
      if (document.all.tags("td")[i].className == 'headtd')
       document.all.tags("td")[i].bgColor = '#cccc66';
    }
    obj2.bgColor = '#cccc66';
    moveme(obj1);
}
//移动菜单内容
function moveme(obj)
{
    idnumber = parseInt(obj.id.substr(4));
    objtop = titleHeight * (idnumber - 1);
    objbuttom = bodyHeight + titleHeight * (idnumber - 2);
    currenttop = parseInt(obj.style.top);
    if (currenttop >= objbuttom)
    {
      //检验出每一个应该向上移动的层
      countid = 1;
      for(i=0;i<document.all.tags("div").length;i++)
      {
       if (document.all.tags("div")[i].id == 'item'+countid+'body')
       {
        obj = document.all.tags("div")[i];
        objtop = titleHeight * (countid - 1);
        moveup(obj,objtop);
        if (countid == idnumber)
         break;
        countid++;
       }
      }
}
else if ((currenttop <= objtop) && (idnumber < groupcount))
{
  //检验出每一个应该向下移动的层
  idnumber++;
  countid = groupcount;
  for(i=document.all.tags("div").length-1;i>=0;i--)
  {
   if (document.all.tags("div")[i].id == 'item'+countid+'body')
   {
    obj = document.all.tags("div")[i];
    objbuttom = bodyHeight + titleHeight * (countid - 2);
    movedown(obj,objbuttom);
    if (countid == idnumber)
     break;
    countid--;
   }
  }
}
}
//向上移动的方法
function moveup(obj,objtop)
{
    currenttop = parseInt(obj.style.top);
    if (currenttop > objtop)
    {
      obj.style.top = currenttop - step;
      window.setTimeout('moveup('+obj.id+','+objtop+')',1)
    }
}
//向下移动的方法
function movedown(obj,objbuttom)
{
    currenttop = parseInt(obj.style.top);
    if (currenttop < objbuttom)
    {
      obj.style.top = currenttop + step;
      window.setTimeout('movedown('+obj.id+','+objbuttom+')',1)
    }
}
</script>
<style type="text/css">
<!--showme
.headtd {  border: 3px outset; border-color: #00bbFF #0007cc 
#0007cc #00aacc; cursor: hand; font-size: 10pt}
.bodytd {  background: gray; border: 2px outset; border-color: 
#00aaFF #0007cc #0007cc #00aacc; font-size: 10pt}
-->
</style>
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div id="mainboard" style="position:absolute; 
left:2px; top:2px; width:120px; height:226px; z-index:3; 
overflow: hidden; background-color: #cccc66;">
  <div id="item1body" style="position:absolute; 
left:0; top:0; width:120px; height:160px; z-index:1; 
overflow: hidden">
    <table width="100%" border="0" height="100%" 
cellpadding="2" cellspacing="0">
      <tr>
        <td id="item1head" height="20" class="headtd" 
onclick="showDiv(item1body,this)" bgcolor="#cccc66">
          <div align="center">第一级</div>
        </td>
    </tr>
    <tr>
        <td class="bodytd">
          <div align="center">123</div>
        </td>
    </tr>
  </table>
  </div>
  <div id="item2body" style="position:absolute; 
left:0px; top:160; width:120; height:160; z-index:2; 
overflow: hidden">
    <table width="100%" border="0" height="100%" 
cellpadding="2" cellspacing="0">
      <tr>
        <td id="item2head" height="20" class="headtd" 
onclick="showDiv(item2body,this)" bgcolor="#cccc66">
          <div align="center">第二级</div>
        </td>
      </tr>
      <tr>
        <td class="bodytd">
          <div align="center">456</div>
        </td>
      </tr>
    </table>
    <p class="headtd"> </p>
  </div>
  <div id="item3body" style="position:absolute; 
left:0; top:182; width:120px; height:160; z-index:3">
    <table width="100%" border="0" height="100%" 
cellpadding="2" cellspacing="0">
      <tr>
        <td id="item3head" height="20" class="headtd" 
onclick="showDiv(item3body,this)" bgcolor="#cccc66">
          <div align="center">第三级</div>
        </td>
      </tr>
      <tr>
        <td class="bodytd">
          <div align="center">789</div>
        </td>
      </tr>
    </table>
  </div>
  <div id="item4body" style="position:absolute; 
left:0; top:204; width:120px; height:160; z-index:4; 
overflow: hidden">
    <table width="100%" border="0" height="100%" 
cellpadding="2" cellspacing="0">
      <tr>
        <td id="item4head" height="20" class="headtd" 
onclick="showDiv(item4body,this)" bgcolor="#cccc66">
          <div align="center">第四级</div>
        </td>
      </tr>
      <tr>
        <td class="bodytd">
          <div align="center">000</div>
        </td>
      </tr>
    </table>
  </div>
</div>
</body>
</html>

 

 
【运行效果】

类似QQ主界面的菜单运行效果