发布于 2017-02-08 09:33:29 | 121 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
本文实例讲述了javascript实现超炫的向上滑行菜单。分享给大家供大家参考。具体如下：
<!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实现文字上下滑动导航</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>首页</span>
<span class="active">首页</span>
</strong>
</a>
</li>
<li>
<a href="#">
<strong>
<span>前端开发课程</span>
<span class="active">前端开发课程</span>
</strong>
</a>
</li>
<li>
<a href="#">
<strong>
<span>妙味视频教程</span>
<span class="active">妙味视频教程</span>
</strong>
</a>
</li>
<li>
<a href="#">
<strong>
<span>周末班上课安排</span>
<span class="active">周末班上课安排</span>
</strong>
</a>
</li>
<li>
<a href="#">
<strong>
<span>结课标准</span>
<span class="active">结课标准</span>
</strong>
</a>
</li>
<li>
<a href="#">
<strong>
<span>联系妙味</span>
<span class="active">联系妙味</span>
</strong>
</a>
</li>
</ul>
</div>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。