這篇文章主要介紹了javascript實現超炫的向上滑行菜單實現方法,以一個完整實例形式分析了javascript針對頁面元素的遍歷與樣式操作相關技巧,具有一定參考借鑒價值,需要的朋友可以參考下
本文實例講述了javascript實現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實現文字上下滑動導航</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</span>
- <span class="active">首頁</span>
- </strong>
- </a>
- </li>
- <li>
- <a href="#">
- <strong>
- <span>前端開發課程</span>
- <span class="active">前端開發課程</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>結課標準</span>
- <span class="active">結課標準</span>
- </strong>
- </a>
- </li>
- <li>
- <a href="#">
- <strong>
- <span>聯系妙味</span>
- <span class="active">聯系妙味</span>
- </strong>
- </a>
- </li>
- </ul>
- </div>
- </body>
- </html>
希望本文所述對大家的javascript程序設計有所幫助。
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