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javascript實(shí)現(xiàn)超炫的向上滑行菜單實(shí)例

 更新時(shí)間：2015年08月03日 10:38:08   作者：jinfuiou  
這篇文章主要介紹了javascript實(shí)現(xiàn)超炫的向上滑行菜單實(shí)現(xiàn)方法,以一個(gè)完整實(shí)例形式分析了javascript針對(duì)頁(yè)面元素的遍歷與樣式操作相關(guān)技巧,具有一定參考借鑒價(jià)值,需要的朋友可以參考下

本文實(shí)例講述了javascript實(shí)現(xiàn)超炫的向上滑行菜單。分享給大家供大家參考。具體如下：

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JS實(shí)現(xiàn)文字上下滑動(dòng)導(dǎo)航</title>
<style type="text/css"> 
body { margin:0; background:#66FF99; }
ul { padding-left:0; margin:0; }
li { list-style:none; }
#nav { height:40px; background:#900; margin-top:50px; }
#nav ul { width:240px; height:40px; margin:0 auto; }
#nav li {height:40px; width:240px;}
#nav a { float:left; width:240px;position:relative; height:40px; overflow:hidden; font-size:14px; color:#e0e03a; text-decoration:none; cursor:pointer; }
#nav strong { float:left;width:240px; }
#nav span { float:left;width:200px; padding:0 20px; height:40px; line-height:40px; background:#900; clear:both; white-space:nowrap;}
#nav .active,#nav .current span { background:#600; color:#fff; }
#nav .current .active { color:#e0e03a; }
</style>
<script> 
window.onload=function()
{
 var oDiv=document.getElementById('nav');
 var aStrong=oDiv.getElementsByTagName('strong');
 var aA=oDiv.getElementsByTagName('a');
 var iTarget=oDiv.getElementsByTagName('li')[0].offsetHeight;
 for(var i=0; i<aStrong.length; i++)
 {
  aA[i].style.width=aStrong[i].style.width=aStrong[i].getElementsByTagName('span')[0].offsetWidth+'px';
  aStrong[i].style.position='absolute';
  aStrong[i].style.top=aStrong[i].style.left=0;
  aStrong[i].onmouseover=function()
  {
   startMove(this, -iTarget);
  };
  aStrong[i].onmouseout=function()
  {
   startMove(this, 0);
  };
 }
};
function startMove(obj,target)
{
 clearInterval(obj.iTime);
 obj.iTime=setInterval(function(){
  if(obj.offsetTop==target)
  {
   clearInterval(obj.iTime);
  }
  else
  {
   var iSpeed=(target-obj.offsetTop)/4;
   iSpeed=iSpeed>0?Math.ceil(iSpeed):Math.floor(iSpeed);
   obj.style.top=obj.offsetTop+iSpeed+'px';
  }
 }, 30);
}
</script>
</head>
<body>
<div id="nav">
 <ul>
  <li class="current">
   <a href="#">
    <strong>
     <span>首頁(yè)</span>
     <span class="active">首頁(yè)</span>
    </strong>
   </a>
  </li>
  <li>
   <a href="#">
    <strong>
     <span>前端開(kāi)發(fā)課程</span>
     <span class="active">前端開(kāi)發(fā)課程</span>
    </strong>
   </a>
  </li>
  <li>
   <a href="#">
    <strong>
     <span>妙味視頻教程</span>
     <span class="active">妙味視頻教程</span>
    </strong>
   </a>
  </li>
  <li>
   <a href="#">
    <strong>
     <span>周末班上課安排</span>
     <span class="active">周末班上課安排</span>
    </strong>
   </a>
  </li>
  <li>
   <a href="#">
    <strong>
     <span>結(jié)課標(biāo)準(zhǔn)</span>
     <span class="active">結(jié)課標(biāo)準(zhǔn)</span>
    </strong>
   </a>
  </li>
  <li>
   <a href="#">
    <strong>
     <span>聯(lián)系妙味</span>
     <span class="active">聯(lián)系妙味</span>
    </strong>
   </a>
  </li>
 </ul>
</div>
</body>
</html>

希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。

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