我想让导航栏固定在顶部,当用户滚动到导航栏时,它会保持固定,当用户向上滚动超过导航栏时,它会取消固定。我知道只有通过JavaScript才能实现这个功能。作为JavaScript的初学者,越简单越好。 JSFIDDLE在此处
HTML代码如下:
<section class="main">
<div id="wrap">
<div id="featured">
<div class="wrap">
<div class="textwidget">
<div class="cup"><img src="#""></div>
<div id="header"></div></div></div></div></div></div></div>
<div class="whiteboard">
<h1><a href="#">HELLO GUYS</a></h1> </div>
</div>
<div class="bg1">
<h2> WE ARE AN EVENTS MANAGEMENT COMPANY BASED IN LONDON. </h2></div>
CSS如下:
.main{text-align:center;}
h1{
-webkit-font-smoothing: antialiased;
display:inline-block;
font: 800 1.313em "proxima-nova",sans-serif;
padding: 10px 10px;
margin: 20px 20px;
letter-spacing: 8px;
text-transform: uppercase;
font-size:3.125em;
text-align: center;
max-width: 606px;
line-height: 1.45em;
position: scroll;
background-color:#e94f78;
text-decoration: none;
color:yellow;
background-image:url;
}
h1 a{
text-decoration: none;
color:yellow;
padding-left: 0.15em;
}
h2{
-webkit-font-smoothing: antialiased;
display:inline-block;
font: 800 1.313em "proxima-nova",sans-serif;
letter-spacing: 8px;
margin-top: 100px;
text-transform: uppercase;
font-size:3.125em;
text-align: center;
line-height: 1.45em;
position: scroll;
text-decoration: none;
color:white;
z-index: -9999;
}
h2 a{
text-decoration: none;
color:white;
padding-left: 0.15em;
}
h5{
position: absolute;
font-family:sans-serif;
font-weight:bold;
font-size:40px;
text-align: center;
float: right;
background-color:#fff;
margin-top: -80px;
margin-left: 280px;
}
h5 a{
text-decoration: none;
color:red;
}
h5 a:hover{
color:yellow;
}
#text1{
-webkit-font-smoothing: antialiased;
display:inline-block;
font: 800 1.313em "proxima-nova",sans-serif;
margin: 20px 20px;
letter-spacing: 8px;
text-transform: uppercase;
font-size:3.125em;
text-align: center;
max-width: 606px;
line-height: 1.45em;
position: scroll;
background-color:#E94F78;
}
#text1 a{
color:yellow;
text-decoration: none;
padding-left: 0.15em;
}
#text1 a:hover{
text-decoration: none;
cursor:pointer;
}
.whiteboard{
background-image:url(http://krystalrae.com/img/krystalrae-2012-fall-print-leopard-sketch.jpg);
background-position: center;
padding: ;
background-color: #fff;
z-index: 1000;
}
.bg{
height:2000px;
background-color:#ff0;
background-image:url(http://alwayscreative.net/images/stars-last.jpg);
position:relative;
z-index: -9999;
}
.bg1{
background-image:url(http://alwayscreative.net/images/stars-last.jpg);
z-index: -9999;
height:1000px;
}
/* Header */
#wrap {
margin: 0 auto;
padding: 0;
width: 100%;
}
#featured {
background: #E94F78 url(http://www.creativityfluid.com/wp-content/themes/creativityfluid/images/img-bubbles-red.png) no-repeat top;
background-size: 385px 465px;
color: #fff;
height: 535px;
overflow: hidden;
position: relative;
z-index: -2;
}
#featured .wrap {
overflow: hidden;
clear: both;
padding: 70px 0 30px;
position: fixed;
z-index: -1;
width: 100%;
}
#featured .wrap .widget {
width: 80%;
max-width: 1040px;
margin: 0 auto;
}
#featured h1,
#featured h3,
#featured p {
color: yellow;
text-shadow: none;
}
#featured h4{
color:white;
text-shadow:none;
}
#featured h4 {
margin: 0 0 30px;
}
#featured h3 {
font-family: 'proxima-nova-sc-osf', arial, serif;
font-weight: 600;
letter-spacing: 3px;
}
#featured h1 {
margin: 0;
}
.textwidget{
padding: 0;
}
.cup{
margin-top:210px;
z-index: 999999;
}
.container{font-size:14px; margin:0 auto; width:960px}
.test_content{margin:10px 0;}
.scroller_anchor{height:0px; margin:0; padding:0;background-image:url()}
.scroller{background:#FFF;
background-image:url(http://krystalrae.com/img/krystalrae-2012-fall-print-leopard-sketch.jpg);
margin:0 0 10px; z-index:100; height:50px; font-size:18px; font-weight:bold; text-align:center; width:960px;}