<!DOCTYPE HTML>
<html>
<head>
<title>导航定位</title>
<meta charset="utf-8">
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script src="jquery-1.11.3.min.js"></script>
</head>
<style type="text/css">
* {
margin:0px;
padding:0px;
font-family:‘微软雅黑‘;
}
div {
height:400px;
border:1px solid red;
width:600px;
}
ul {
overflow:hidden;
position:fixed;
top:300px;
left:650px;
}
li {
width:40px;
height:40px;
background:#3F883E;
text-align:center;
line-height:40px;
color: rgb(0,255,0);
,font-size:18px;
cursor:pointer;
border-bottom:1px solid #fff;
}
li.active {
width: 38px;
height: 38px;
margin-bottom: 1px;
border: 1px solid #3F883E;
background: #fff;
color: rgb(255,0,0);
}
</style>
<body>
<div class="div1">段落1</div>
<div class="div2">段落2</div>
<div class="div3">段落3</div>
<div class="div4">段落4</div>
<div class="div5">段落5</div>
<div class="div6">段落6</div>
<div class="div7">段落7</div>
<ul>
<li class="li1 active">1</li>
<li class="li2">2</li>
<li class="li3">3</li>
<li class="li4">4</li>
<li class="li5">5</li>
<li class="li6">6</li>
<li class="li7">7</li>
</ul>
<script type="text/javascript">
// 匹配元素的左上角相对文档左上角的偏移
var arrOffsetTop = [
$(‘.div1‘).offset().top,
$(‘.div2‘).offset().top,
$(‘.div3‘).offset().top,
$(‘.div4‘).offset().top,
$(‘.div5‘).offset().top,
$(‘.div6‘).offset().top,
$(‘.div7‘).offset().top
];
var fTotalHgt = 0;
for(var i=0; i<$(‘div‘).length; i++) {
//返回匹配元素的外部高度，包含padding和border，不包含margin
fTotalHgt += $(‘div‘).eq(i).outerHeight();
}
//平均高度，用于调整滚动
var fAverageHgt = parseFloat(fTotalHgt / $(‘div‘).length);
// 滚动事件(每次滚动都做一次循环判断)
$(window).scroll(function() {
for(var i=0; i<$(‘div‘).length; i++) {
//页面滚动条的位置
if($(this).scrollTop() > arrOffsetTop[i] - fAverageHgt) { // 减去一个固定值，是定位准确点
$(‘ul li‘).eq(i).addClass(‘active‘).siblings().removeClass(‘active‘);
}
}
});
/* 点击事件 */
$(‘ul li‘).click(function() {
$(this).addClass(‘active‘).siblings().removeClass(‘active‘);
//在500ms之内，将body的滚动条滚动到指定位置
$(‘body, html‘).animate({scrollTop: arrOffsetTop[$(this).index()]}, 500);
});
</script>
</body>
</html>
时间： 2024-11-06 14:29:19