标签：框架 ext off offset list char doc enter idt
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title></title>
<style>
*{margin: 0;padding: 0;}
html,body{width: 100%;height: 100%;}
ul,ol{list-style: none;}
ul{width: 100%;height: 100%;}
ul li{width: 100%;height: 100%;}
ol{position: fixed;top: 100px;left: 100px;}
ol li{
width: 50px;
height: 50px;
border: 1px solid #000;
margin-top: -1px;
text-align: center;
font: 400 22px/50px "simsun";
cursor: pointer;
}
</style>
</head>
<body>
<ul id="ul">
<li>男装区</li>
<li>女装区</li>
<li>童装区</li>
<li>孕装区</li>
<li>老年装区</li>
</ul>
<ol id="ol">
<li>男装</li>
<li>女装</li>
<li>童装</li>
<li>孕装</li>
<li>老年</li>
</ol>
</body>
</html>
<script>
//需求：给所有盒子添加颜色，点击ol的li，页面跳转到ul中相应的li
//步骤：
//1、利用数组给所有盒子添加颜色
//2、缓动框架移动最顶端
//3、移动到指定位置（给ol中的li绑定索引值，获取对应的ul中的li距离顶端的距离，赋值给target，好让页面跳转
//4、屏幕滑动，记录屏幕的位置
var ul = document.getElementById("ul");
var ol = document.getElementById("ol");
var ulLis = ul.children;
var olLis = ol.children;
var arr = ["pink","yellow","green","purple","orange"];
var timer = null,target = 0,leader = 0;
window.onscroll = function () {
//屏幕滑动，给屏幕目前所在的位置赋值。
leader = scroll().top;
}
for(var i=0;i<olLis.length;i++){
//为每一个盒子上色，ul和ol中的li对应颜色
ulLis[i].style.backgroundColor = arr[i];
olLis[i].style.backgroundColor = arr[i];
olLis[i].index = i;
olLis[i].onclick = function(){
//给目标位置赋值(小盒子对应的大盒子距离顶部的距离)
target = ulLis[this.index].offsetTop;
clearInterval(timer);
timer = setInterval(function(){
var step = (target-leader)/10;
step = step>0?Math.ceil(step):Math.floor(step);
leader = leader+step;
window.scrollTo(0,leader);
if(target == leader){
clearInterval(timer);
}
},30)
}
}
</script>
标签：框架 ext off offset list char doc enter idt
原文地址：http://www.cnblogs.com/xiangru0921/p/6678604.html
