鼠标放上弹出仿QQ下拉菜单的代码_菜单导航特效

在DISCUZ论坛，BBSMAX论坛以及QQ网站经常会看到这种效果，鼠标移上文字滑出一个菜单层，层里面可以自定义菜单内容，鼠标移走后菜单消失，不影响网页整体布局，网页的整体外形也不会发生任何变化。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>仿QQ下拉菜单</title>

function $id(id)
{
 return document.getElementById(id);
}

function getPos(parentObj)
{
 var parentPos = [];
 parentPos[0] = parentObj.offsetLeft;//x
 parentPos[1] = parentObj.offsetTop;//y
 while (parentObj = parentObj.offsetParent)
 {
  parentPos[0] += parentObj.offsetLeft;
  parentPos[1] += parentObj.offsetTop;
 }
 return parentPos;
}

function showMoreSoftware(parentObj,childName)
{
 if (g_hideTimer != null)
 {
  clearTimeout(g_hideTimer);
  return;
 }
 var parentPos = getPos(parentObj);
 $id(childName).style.left = parentPos[0] + "px";
 $id(childName).style.top = parentPos[1] + 26 + "px";
 $id("lockBtn").style.left = "163px";
 parentObj.className = "active";
 $id(childName).style.display = "block";
 g_parent = parentObj;
 g_child = $id(childName);
}

function hideMoreSoftware()
{
 if (g_locked == true)
 {
  return;
 }
 else
 {
  g_hideTimer = setTimeout(function(){hidingMenu();},1);
 }
}

function hidingMenu()
{
 g_parent.className = "normal";
 g_child.style.display = "none";
 clearTimeout(g_hideTimer);
 g_hideTimer = null;
 if (g_locked == true)
 {
  $id("lockBtn").className = "drawingPin";
  g_locked = false;
 }
}

h2{
 padding:0; margin:0; font-weight:bold; font-size:12px; height:28px; width:142px;}

h2.active{
 background:#99c9e3;}

h2 div{
 position:absolute; padding:1px 1px 0 1px; margin:1px 1px 0 1px; width:138px; overflow:hidden; z-index:10; cursor:pointer;}

h2.active div{
 background:white;}

h2 span{
 display:block; padding:0 9px; height:26px;}
h2.active span{
 background:url(http://p1.mb5u.com/texiao/0/20100522230741250.gif) repeat-x left top; }
h2 span em{
 font-style:normal; display:block; background:url(http://p1.mb5u.com/texiao/0/20100522230741250.gif) no-repeat right -26px; padding-right:15px; line-height:25px;}

.softList{
 position:absolute; background:white; border:1px #99c9e3 solid; z-index:9; padding:5px 10px; width:165px; display:none;}

.left{
 float:left; width:50%;}
.right{
 float:right; width:50%;}
h3{
 color:#cc6600; margin:0; padding:0; font-size:14px; font-weight:bolder;}
ul{
 margin:0; padding:0 0 20px 0;}
ul.last{
 padding:0;}
ul li{
 height:auto; line-height:18px; }
ul li a{
 font-size:12px;}
</style>
</head>

<body>
<div class="main">
 <div>
   <div class="part1">
     <div class="version">
          <div class="padder">
   <h2 onmouseover="showMoreSoftware(this,'softList')" onmouseout="hideMoreSoftware()" class="normal"><div><span><em>模板无忧导航栏</em></span></div></h2>
              <div class="softList" id="softList" onmouseover="showMoreSoftware()" onmouseout="hideMoreSoftware()">
               <a class="drawingPin" href="javascript:void(0);" onclick="lockMenu()" id="lockBtn" title="固定"></a>
                <div class="qq">
                <h3>ASP资源</h3>
                    <ul>
                        <li><a onclick="hidingMenu()" href="/sort/list_1_13_1.shtml" target="_blank">优秀论坛社区程序</a></li>
                        <li><a onclick="hidingMenu()" href="/sort/list_1_29_1.shtml" target="_blank">CMS系统建站资源</a></li>
                        <li><a onclick="hidingMenu()" href="/sort/list_1_145_1.shtml" target="_blank">著名博客日记系统</a></li>
                    </ul>
                </div>
                <div class="others">
                 <div class="left">
      <h3>PHP资源</h3>
                        <ul>
                            <li><a onclick="hidingMenu()" href="/sort/list_2_35_1.shtml" target="_blank">企业建站</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_2_34_1.shtml" target="_blank">留言程序</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_2_47_1.shtml" target="_blank">相册系统</a></li>
                        </ul>
                        <h3>JAVA实例</h3>
                        <ul class="last">
                            <li><a onclick="hidingMenu()" href="/sort/list_5_80_1.shtml" target="_blank">游戏编程</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_5_99_1.shtml" target="_blank">JAVA窗体</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_5_82_1.shtml" target="_blank">媒体与网络</a></li>
                        </ul>
                    </div>
                    <div class="right">
                     <h3>脚本资源</h3>
                        <ul>
                            <li><a onclick="hidingMenu()" href="/sort/list_11_203_1.shtml" target="_blank">AJAX资源</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_11_168_1.shtml" target="_blank">CSS殊效</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_11_202_1.shtml" target="_blank">网页编辑器</a></li>
                        </ul>
                        <h3>生活品味</h3>
                        <ul>
                            <li><a onclick="hidingMenu()" href="/sort/list_7_228_1.shtml" target="_blank">AJAX教程</a></li>
                            <li><a onclick="hidingMenu()" href="/sort/list_7_136_1.shtml" target="_blank">JAVA开发</a></li>
                        </ul>
                    </div>
                </div>
              </div>
          </div>
        </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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