本文实例讲述了js焦点文字滚动效果。分享给大家供大家参考。具体如下：效果描述：今天推荐的这个又是一个原生的js焦点图效果默认自动切换，也可以手动切换javascript代码采用函数式对象编程，也就是javascript编程中的module模式基本用法很简单，主要特点有三：1、模块化，可重用2、封装了变量和function，和全局的命名空间不接触，不污染全局变量3、只暴露可用public方法，其他私有方法全部隐藏，确保js相互之间不会冲突运行效果图：
小提示：浏览器中如果不能正常运行，可以尝试切换浏览模式。为大家分享的jQuery下拉美化搜索表单效果代码如下
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>纯js(不依赖现有框架)焦点文字滚动效果</title>
<style >
*{margin:0;padding:0; list-style:none;}
#slider{overflow:hidden;width:470px;height:150px;position:relative; margin:100px auto;}
#slider .pics{width:470px;height:150px}
#slider .pics li{height:150px;width:470px;float:left}
#slider #nav {position:absolute;bottom:5px;right:5px;}
#slider #nav li.nav{background:#F47500; color:#fff;}
#slider #nav li{border:1px solid #f47500; color:#d94b01; cursor:pointer;background:#fff;font-size:12px; height:15px;width:15px;float:left;margin-left:4px;display:inline;text-align:center}
</style>
</head>
<body>
<!--代码部分begin-->
<div id="slider">
<ul class="pics">
<li>@@##@@</li>
<li>@@##@@</li>
<li>@@##@@</li>
<li>@@##@@</li>
<li>@@##@@</li>
</ul>
<ul id="nav">
<li onmouseover="setTimeout(function(){lanrenzhijia.slider.pos(0)},300)">1</li>
<li onmouseover="setTimeout(function(){lanrenzhijia.slider.pos(1)},300)">2</li>
<li onmouseover="setTimeout(function(){lanrenzhijia.slider.pos(2)},300)">3</li>
<li onmouseover="setTimeout(function(){lanrenzhijia.slider.pos(3)},300)">4</li>
<li onmouseover="setTimeout(function(){lanrenzhijia.slider.pos(4)},300)">5</li>
</ul>
</div>
<script>
var lanrenzhijia = {}, H$ = function(id){return document.getElementById(id)}, H$$ = function(c,p){return p.getElementsByTagName(c)}
lanrenzhijia.slider = function(){
return{
init:function(id,options){
var ul = this.u = H$$("ul",H$(id))[0], li = H$$("li",ul); this.l=li.length; this.index = 0;
if(options.navId&&options.curClass){this.nav = H$$("li",H$(options.navId)), this.c = options.curClass;}
this.a=options.auto||0; this.v=options.vertical||0;H$(id).style.overflow = "hidden";H$(id).style.position = "relative";ul.style.position="absolute";
if(this.v){ul.style.top=0; this.h=options.height||li[0].offsetHeight; ul.style.height=(this.l*this.h)+"px";}
else{ul.style.left=0; this.w=options.width||li[0].offsetWidth; ul.style.width=(this.l*this.w)+"px";}
this.pos(options.index||0,this.a?1:0);
},
pos:function(pos,a){
clearInterval(this.u.posAnim); clearInterval(this.u.auto);
var curPos=this.v?parseInt(this.u.style.top):parseInt(this.u.style.left),
correctPos=this.v?pos*this.h:pos*this.w,
direction = correctPos>Math.abs(curPos)?1:-1;
correctPos*=-1;
this.index = pos;
if(this.nav){for(var i=0;i<this.l;i++){this.nav[i].className = i==pos?this.c:""}}
this.u.posAnim = setInterval(function(){lanrenzhijia.slider.anim(correctPos,direction,a)},10);
},
anim:function(des,dir,a){
var curPos=this.v?parseInt(this.u.style.top):parseInt(this.u.style.left);
if(curPos == des){
clearInterval(this.u.posAnim);
if(a||this.a){lanrenzhijia.slider.auto()}
}
else{
var v=curPos-Math.ceil(Math.abs(des-curPos)*.07)*dir+"px";
this.v?this.u.style.top=v:this.u.style.left=v;
}
},
auto:function(){
this.u.auto=setInterval(function(){lanrenzhijia.slider.move(1,1)},this.a*1000)
},
move:function(n,a){
var num=this.index+n, i=n==1?num==this.l?0:num:num<0?this.l-1:num; lanrenzhijia.slider.pos(i,a);
}
};
}();
</script>
<script>
lanrenzhijia.slider.init("slider",{
auto:3,
vertical:1,
navId:"nav",
curClass:"nav",
index:0});
</script>
<!--代码部分end-->
</body>
</html>
