JS CSS realizes the dynamic scrolling navigation bar effect when the mouse slides over

JS CSS realizes the dynamic scrolling navigation bar effect when the mouse slides over_javascript skills

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Release： 2016-05-16 15:38:07

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This article describes the example of JS CSS realizing the dynamic scrolling navigation bar effect when the mouse slides over. Share it with everyone for your reference. The details are as follows:

This is a navigation bar that scrolls dynamically when the mouse is hovered. Note that two background images are used here. Please wait for the web page to load or refresh it several times. This is implemented using JavaScript, but the code seems to be from jQuery Picked out from inside, it looks a bit like it.

The screenshot of the running effect is as follows:

The online demo address is as follows:

http://demo.jb51.net/js/2015/js-css-mouse-over-nav-scroll-style-codes/

The specific code is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>动态翻滚的导航条</title>
<style type="text/css">
.clear:after{content:"."; display:block; height:0; clear:both; visibility:hidden}.clear{display:inline-block}.clear{display:block}
div#nav{height:32px; background:url(images/YL29.jpg) repeat-x}
div#nav ul{
  width:705px;
  list-style:none;
  margin-top: 0;
  margin-right: auto;
  margin-bottom: 0;
  margin-left: 0px;
}
div#nav ul li{
  float:left;
  height:32px;
  overflow:hidden;
  background-image: url(images/YL30.jpg);
  background-repeat: repeat-y;
  background-position: right 0;
  padding-top: 0;
  padding-right: 1px;
  padding-bottom: 0;
  padding-left: 0px;
  font-family: Arial;
  font-size: 12px;
  line-height: 32px;
  font-weight: bold;
}
div#nav ul li a{
  float:left;
  height:100%;
  width: 77px;
  background:url(images/YL28.jpg) repeat-x;
  color:#fff;
  text-decoration:none;
  padding-top: 0;
  padding-right: 5px;
  padding-bottom: 0;
  padding-left: 5px;
  text-align:center;
}
div#nav ul li a.hover{
  clear:both;
  background-position:0 -32px;
  width: 77px;
}
div#nav ul li.on a{
  background-position:0 -32px;
}
div#nav ul li.nobg{background:none}
/* ]]> */
</style>
</head>
<body>
<div id="nav">
<ul class="clear">
<li><a href="#">脚本之家</a></li>
<li><a href="#">网页特效</a></li>
<li><a href="#">工具软件</a></li>
<li><a href="#">脚本下载</a></li>
<li><a href="#">菜单导航</a></li>
<li><a href="#">层和布局</a></li>
<li><a href="#">论坛社区</a></li>
<li><a href="#">广告联系</a></li>
<li class="nobg"></li>
</ul>
</div>
<script type="text/javascript"> 
/* <![CDATA[ */
function nav(c, config){
  this.config = config || {speed: 10, num: 2};
  this.container = (typeof(c)=="object") &#63; c : document.getElementById(c);
  this.lineHeight = this.container.offsetHeight;
  this.scrollTimeId = null;
  var _this = this;  
  this.__construct = function (){
    var inner,el,href;
    inner = _this.container.childNodes[0].innerHTML;
    href = _this.container.childNodes[0].href;
    el = document.createElement("a");
    el.innerHTML = inner;
    el.href = href;
    el.className = 'hover';
    _this.container.appendChild(el);
    _this.container.onmouseover = function (){_this.start()};
    _this.container.onmouseout = function (){_this.end()};
  }();
  this.start = function (){
    _this.clear();
    _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed);
  };
  this.end = function (){
    _this.clear();
    _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed);
  };
  this.scrollUp = function (){
    var c = _this.container;  
    if(c.scrollTop >= _this.lineHeight){c.scrollTop = _this.lineHeight;return;}
    c.scrollTop += _this.config.num;
    _this.scrollTimeId = setTimeout(function(){_this.scrollUp();}, _this.config.speed);
  };
  this.scrollDown = function (){
    var c = _this.container;
    
    if(c.scrollTop <= 0){c.scrollTop = 0;return;}
    c.scrollTop -= _this.config.num;
    _this.scrollTimeId = setTimeout(function(){_this.scrollDown();}, _this.config.speed);
  };
  this.clear = function (){clearTimeout(_this.scrollTimeId)};
}
(function(){
  var container = document.getElementById('nav');
  var el_li = container.getElementsByTagName('li');
  var arr = [];
  for( var i = 0; i < el_li.length; i++){
    if(el_li[i].className == 'on') continue;
    arr[i] = new nav(el_li[i], {speed: 10, num: 4});
  }
})
();
/* ]]> */
</script>
</body>
</html>

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I hope this article will be helpful to everyone’s JavaScript programming.