基于javascript的無(wú)縫滾動(dòng)動(dòng)畫實(shí)現(xiàn)2

更新時(shí)間：2020年08月07日 10:05:35 作者：司徒正美

這篇文章主要介紹了基于javascript的無(wú)縫滾動(dòng)動(dòng)畫實(shí)現(xiàn)2，文章通過(guò)示例代碼介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值，需要的朋友們下面隨著小編來(lái)一起學(xué)習(xí)學(xué)習(xí)吧

以更少的代碼實(shí)現(xiàn)相同的效果應(yīng)該是我們寫程序的究極目標(biāo)，當(dāng)然可讀性不能丟。在基于javascript的無(wú)縫滾動(dòng)動(dòng)畫實(shí)現(xiàn)1最后一個(gè)運(yùn)行框，我已經(jīng)做了這樣的探索。不過(guò)換湯不換藥，還是來(lái)來(lái)回回在scrollTop/scrollLeft與offsetTop/offsetLeft上做文章?？偟乃悸坊臼沁@樣，讓某個(gè)元素整體向某個(gè)方向移動(dòng)，這樣它里面的內(nèi)容（圖片或文字）就跟著移動(dòng)，當(dāng)元素移動(dòng)到某一個(gè)距離后就回到原點(diǎn)。為了防止內(nèi)容移著移著就沒(méi)有了，我們需要兩套相同的內(nèi)容。在第一部分，第二套內(nèi)容是動(dòng)態(tài)生成的，并復(fù)制到另一個(gè)兄弟元素中，這在水平滾動(dòng)時(shí)，我們需要花一些周折來(lái)讓所有內(nèi)容水平排列在一起。我就想，如果把第二套內(nèi)容直接加在相同的元素是否效果會(huì)更好呢？起碼CSS也少寫一點(diǎn)。用scrollTop/scrollLeft實(shí)現(xiàn)滾動(dòng)，還有一個(gè)缺點(diǎn)，它對(duì)父容器的寬度與高度有嚴(yán)格的規(guī)定的。比如我們想上下滾動(dòng)圖片，ul作為容器，li的圖片為滾動(dòng)內(nèi)容，那么ul的高至少為圖片的高的兩倍（我們假設(shè)每張圖片的尺寸都是相等的），否則就動(dòng)不了。鑒此，我開(kāi)發(fā)了新一代的無(wú)縫滾動(dòng)函數(shù)。

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<!doctype html>
<title>javascript無(wú)縫滾動(dòng) by 司徒正美</title>
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<meta name="keywords" content="javascript無(wú)縫滾動(dòng) by 司徒正美" />
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 Marquee("marquee");
 }
</script>
<h1>javascript無(wú)縫滾動(dòng)(向上滾動(dòng)) by 司徒正美</h1>
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
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 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s017.jpg" alt="無(wú)縫滾動(dòng) by 司徒正美"/></a>
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 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s020.jpg" alt="無(wú)縫滾動(dòng) by 司徒正美"/></a>
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 </li>
</ul>

向下滾動(dòng)也很容易，只不過(guò)一開(kāi)始把它定位到第一套內(nèi)容與第二套內(nèi)容之間，也就是slide.offsetHeight，不過(guò)我們需要把它改成負(fù)數(shù)讓向整體向下移動(dòng)，然后再慢慢向上移動(dòng)。

 
<!doctype html>
<title>javascript無(wú)縫滾動(dòng) by 司徒正美</title>
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 Marquee("marquee");
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</script>
<h1>javascript無(wú)縫滾動(dòng)(向下滾動(dòng)) by 司徒正美</h1>
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
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 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s017.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s018.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s019.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s020.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s021.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s022.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s023.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 </li>
</ul>

實(shí)現(xiàn)水平移動(dòng)也比第一部分容易，結(jié)構(gòu)層完全不用改動(dòng)，表現(xiàn)層也改動(dòng)很少。

#marquee ,#marquee li {
 padding:0;
 margin:0;
}
#marquee {
 position:relative;
 list-style:none;
 height:150px;
 width:200px;
 overflow:hidden;
 border:10px solid #B45B3E;
}
#marquee li {
 position:absolute;
 width:1000%;/*★★新增加★★*/
}
#marquee a {
 float:left;/*★★新增加★★*/
}
#marquee img {
 display:block;
 border:0;
}

難點(diǎn)是如何獲取那個(gè)臨界值，也就是夾在第一套內(nèi)容與第二個(gè)套內(nèi)容之間的那個(gè)位置。由于第二套內(nèi)容我們并沒(méi)有外套一個(gè)元素，因此我們需要從滾動(dòng)對(duì)象下手。滾動(dòng)對(duì)象都是a元素，我們需要計(jì)算出第二套內(nèi)容的第一個(gè)a元素到達(dá)父元素左邊的距離。這個(gè)值就是我們要求的臨界值。明白這點(diǎn)，就輕松了。

 //*************略********* 
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),
 critical = item[item.length/2].offsetLeft,//臨界值
//*************略*********

 
<!doctype html>
<title>javascript無(wú)縫滾動(dòng) by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript無(wú)縫滾動(dòng) by 司徒正美" />
<meta name="description" content="javascript無(wú)縫滾動(dòng) by 司徒正美" />
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<style type="text/css">
 h1 {
 font:400 16px/1 "Microsoft YaHei",KaiTi_GB2312,SimSun
 }
 #marquee ,#marquee li {
 padding:0;
 margin:0;
 }
 #marquee {
 position:relative;
 list-style:none;
 height:150px;
 width:200px;
 overflow:hidden;
 border:10px solid #8080C0;
 }
 #marquee li {
 position:absolute;
 width:1000%;/*新增加*/
 }
 #marquee a {
 float:left;/*新增加*/
 }
 #marquee img {
 display:block;
 border:0;
 }
</style>
<script type="text/javascript">
 var Marquee = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 speed = arguments[1] || 10;
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),
 critical = item[item.length/2].offsetLeft,//臨界值
 delta = 0;
 var rolling = function(){
  delta == -critical ? delta = 0 : delta--;
  slide.style.left = delta + "px";
 }
 var timer = setInterval(rolling,speed)//設(shè)置定時(shí)器
 container.onmouseover=function() {clearInterval(timer)}//鼠標(biāo)移到marquee上時(shí)，清除定時(shí)器，停止?jié)L動(dòng)
 container.onmouseout=function() {timer=setInterval(rolling,speed)}//鼠標(biāo)移開(kāi)時(shí)重設(shè)定時(shí)器
 }
 window.onload = function(){
 Marquee("marquee");
 }
</script>
<h1>javascript無(wú)縫滾動(dòng)(向左滾動(dòng)) by 司徒正美</h1>
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<ul id="marquee">
 <li>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s017.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s018.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s019.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s020.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s021.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s022.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s023.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 </li>
</ul>

下面是向右滾動(dòng)，由于都是不足20行的腳本，應(yīng)該一看源碼就明白，不詳述了。

 
<!doctype html>
<title>javascript無(wú)縫滾動(dòng) by 司徒正美</title>
<meta charset="utf-8"/>
<meta name="keywords" content="javascript無(wú)縫滾動(dòng) by 司徒正美" />
<meta name="description" content="javascript無(wú)縫滾動(dòng) by 司徒正美" />
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<style type="text/css">
 h1 {
 font:400 16px/1 "Microsoft YaHei",KaiTi_GB2312,SimSun
 }
 #marquee ,#marquee li {
 padding:0;
 margin:0;
 }
 #marquee {
 position:relative;
 list-style:none;
 height:150px;
 width:200px;
 overflow:hidden;
 border:10px solid #6cc;
 }
 #marquee li {
 position:absolute;
 width:1000%;
 }
 #marquee a {
 float:left;
 }
 #marquee img {
 display:block;
 border:0;
 }
</style>
<script type="text/javascript">
 var Marquee = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 speed = arguments[1] || 10;
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),//臨界點(diǎn)
 critical = item[item.length/2].offsetLeft,
 delta = -critical;
 var rolling = function(){
  delta == 0 ? delta = -critical : delta++;
  slide.style.left = delta + "px";
 }
 var timer = setInterval(rolling,speed)//設(shè)置定時(shí)器
 container.onmouseover=function() {clearInterval(timer)}//鼠標(biāo)移到marquee上時(shí)，清除定時(shí)器，停止?jié)L動(dòng)
 container.onmouseout=function() {timer=setInterval(rolling,speed)}//鼠標(biāo)移開(kāi)時(shí)重設(shè)定時(shí)器
 }
 window.onload = function(){
 Marquee("marquee");
 }
</script>
<h1>javascript無(wú)縫滾動(dòng)(向右滾動(dòng)) by 司徒正美</h1>
<base  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
<ul id="marquee">
 <li>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s017.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s018.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s019.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s020.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s021.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s022.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 <a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" ><img src="o_s023.jpg" alt="無(wú)縫滾動(dòng)"/></a>
 </li>
</ul>

我們可以把上面四個(gè)函數(shù)合并成一個(gè)函數(shù)，結(jié)構(gòu)層與表現(xiàn)層參照向上滾動(dòng)。

var Marquee = function(id){
 try{document.execCommand("BackgroundImageCache", false, true);}catch(e){};
 var container = document.getElementById(id),
 slide = container.getElementsByTagName("li")[0],
 options = arguments[1] || {},
 speed = options.speed || 10,
 direction = options.direction || "left";
 slide.innerHTML += slide.innerHTML;
 var item = slide.getElementsByTagName("a"),
 critical,delta,rolling,field;
 if(direction == "left" || direction == "right"){
 slide.style.cssText = "width:1000%";
 for(var i=0 ,l=item.length; i<l;i++){
  item[i].style.cssText = "float:left";
 }
 field = "left";
 critical = item[item.length/2].offsetLeft;
 }else if(direction == "up" || direction == "down"){
 field = "top";
 critical = item[item.length/2].offsetTop;
 }
 if(direction == "up" || direction == "left"){
 delta = 0;
 rolling = function(){
  delta == -critical ? delta = 0 : delta--;
  slide.style[field] = delta + "px";
 }
 }else if(direction == "down" || direction == "right"){
 delta = -critical;
 rolling = function(){
  delta == 0 ? delta = -critical : delta++;
  slide.style[field] = delta + "px";
 }
 }
 var timer = setInterval(rolling,speed)//設(shè)置定時(shí)器
 container.onmouseover=function() {clearInterval(timer)}//鼠標(biāo)移到marquee上時(shí)，清除定時(shí)器，停止?jié)L動(dòng)
 container.onmouseout=function() {timer=setInterval(rolling,speed)}//鼠標(biāo)移開(kāi)時(shí)重設(shè)定時(shí)器
}

使用：

Marquee("marquee",{speed:35,direction:"up"});

有了這個(gè)我們實(shí)現(xiàn)另一種圖片輪換就容易了，這里先做個(gè)預(yù)告吧。本文到此為止。

到此這篇關(guān)于基于javascript的無(wú)縫滾動(dòng)動(dòng)畫實(shí)現(xiàn)2的文章就介紹到這了,更多相關(guān)javascript無(wú)縫滾動(dòng)內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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