jq实现滚动定位
直接上代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>爱淘气购物网－JQuery网页定位导航特效</title>
<style>
/*All tag*/
html,
body,
div,
ul,
li,
img,
h1,
h2 {
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
a {
text-decoration: none;
color: #333;
}
/*menu*/
#menu {
position: fixed;
top: 100px;
left: 50%;
margin-left: 400px;
}
#menu>li>a {
display: block;
padding: 10px 15px;
height: 30px;
line-height: 30px;
font-size: 14px;
font-weight: bold;
margin: 5px 0;
}
#menu>li>a:hover,
#menu>li>a.current {
color: #fff;
background-color: #0088bb;
}
/*content*/
#content {
width: 800px;
margin: 30px auto;
}
h1 {
color: #0088bb;
font-size: 30px;
margin-bottom: 10px;
}
.item {
border: 1px dotted #0088bb;
padding: 20px;
margin-bottom: 20px;
}
.item>h2 {
font-size: 16px;
padding-bottom: 5px;
border-bottom: 2px solid #0088bb;
margin-bottom: 10px;
}
.item-list>li {
display: inline-block;
margin-right: 10px;
}
.item-list>li>a>img {
width: 230px;
height: 230px;
border: none;
}
/* IE6 hack*/
* html,
* html body {
background-image: url(about:blank);
background-attachment: fixed;
}
* html #menu {
/*position: fixed*/
position: absolute;
top: expression((e=document.documentElement.scrollTop ? e: document.body.scrollTop) + 100 + 'px');
}
</style>
</head>
<body>
<ul id="menu">
<li><a class="current" href="#item1">1F 男装</a></li>
<li><a href="#item2">2F 女装</a></li>
<li><a href="#item3">3F 美妆</a></li>
<li><a href="#item4">4F 数码</a></li>
<li><a href="#item5">5F 母婴</a></li>
</ul>
<div id="content">
<h1>爱淘气购物网</h1>
<div id="item1" class="item">
<h2>1F 男装</h2>
<ul class="item-list">
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p1.qhimgs4.com/dmfd/160_90_/t01a8d3c891c7c3e202.jpg?size=640x400" alt="商品图片"></a>
</li>
</ul>
</div>
<div id="item2" class="item">
<h2>2F 女装</h2>
<ul class="item-list">
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p2.qhimgs4.com/dmfd/160_90_/t01c5e14034226e1d97.jpg?size=640x400" alt="商品图片"></a>
</li>
</ul>
</div>
<div id="item3" class="item">
<h2>3F 美妆</h2>
<ul class="item-list">
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t017b1f5993c08af904.jpg?size=640x400" alt="商品图片"></a>
</li>
</ul>
</div>
<div id="item4" class="item">
<h2>4F 数码</h2>
<ul class="item-list">
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p0.qhimgs4.com/dmfd/160_90_/t014922d8477716f299.jpg?size=640x400" alt="商品图片"></a>
</li>
</ul>
</div>
<div id="item5" class="item">
<h2>5F 母婴</h2>
<ul class="item-list">
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
<li>
<a href="#"><img src="http://p4.qhimg.com/dmfd/160_90_/t0100eb94d000a1b3c9.jpg" alt="商品图片"></a>
</li>
</ul>
</div>
<div style="width: 100%;height: 1000px;"></div>
</div>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script>
$(function() {
$(window).scroll(function() {
//滚动条发生滚动时，要获取相应的值
var top = $(document).scrollTop();
var menu = $('#menu');
var items = $('#content').find('.item');
var currentId = '';
//获取相应楼层的ID
items.each(function() {
var m = $(this);
var itemTop = m.offset().top;
if (top > itemTop) {
currentId = '#' + m.attr('id');
} else {
return false;
}
//给相应楼层的 a 设置 current，取消其他链接的current
var currentLink = menu.find('.current');
if (currentId && currentLink.attr('href') != currentId) {
currentLink.removeClass('current');
menu.find('[href=' + currentId + ']').addClass('current');
}
});
});
});
</script>
</body>
</html>
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