JS実装で画面切り替え可能なスライド切り替え効果例
本論文の例は、JSが画像を切り替えることができるスライド切り替え効果を実現することを述べている。皆さんに参考にしてあげます。具体的には以下の通りです。
本論文で述べたように、JavaScriptプログラムの設計に役に立ちます。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>JS </title>
<style>
body, div, ul, li { margin: 0; padding: 0; }
ul { list-style-type: none; }
body { background: #000; text-align: center; font: 12px/20px Arial; }
#box { position: relative; width: 322px; height: 172px; background: #fff; border-radius: 5px; border: 8px solid #fff; margin: 10px auto; }
#box .list { position: relative; width: 320px; height: 240px; overflow: hidden; border: 1px solid #ccc; }
#box .list li { position: absolute; top: 0; left: 0; width: 320px; height: 240px; opacity: 0; filter: alpha(opacity=0); }
#box .list li.current { opacity: 1; filter: alpha(opacity=100); }
#box .count { position: absolute; right: 0; bottom: 5px; }
#box .count li { color: #fff; float: left; width: 20px; height: 20px; cursor: pointer; margin-right: 5px; overflow: hidden; background: #F90; opacity: 0.7; filter: alpha(opacity=70); border-radius: 20px; }
#box .count li.current { color: #fff; opacity: 1; filter: alpha(opacity=100); font-weight: 700; background: #f60; }
#tmp { width: 100px; height: 100px; background: red; position: absolute; }
</style>
<script type="text/javascript">
window.onload = function() {
var oBox = document.getElementById("box");
var aUl = document.getElementsByTagName("ul");
var aImg = aUl[0].getElementsByTagName("li");
var aNum = aUl[1].getElementsByTagName("li");
var timer = play = null;
var i = index = 0;
var bOrder = true;
//
for(i = 0; i < aNum.length; i++) {
aNum[i].index = i;
aNum[i].onmouseover = function() {
show(this.index)
}
}
//
oBox.onmouseover = function() {
clearInterval(play)
};
//
oBox.onmouseout = function() {
autoPlay()
};
//
function autoPlay() {
play = setInterval(function() {
//
bOrder ? index++ : index--;
//
index >= aImg.length && (index = aImg.length - 2, bOrder = false);
//
index <= 0 && (index = 0, bOrder = true);
//
show(index)
}, 2000);
}
autoPlay();//
function show(a) {
index = a;
var alpha = 0;
for(i = 0; i < aNum.length; i++)aNum[i].className = "";
aNum[index].className = "current";
clearInterval(timer);
for(i = 0; i < aImg.length; i++) {
aImg[i].style.opacity = 0;
aImg[i].style.filter = "alpha(opacity=0)";
}
timer = setInterval(function() {
alpha += 2;
alpha > 100 && (alpha = 100);
aImg[index].style.opacity = alpha / 100;
aImg[index].style.filter = "alpha(opacity = " + alpha + ")";
alpha == 100 && clearInterval(timer)
}, 20);
}
};
</script>
</head>
<body>
<div id="box">
<ul class="list">
<li class="current"><img src="img/3.jpg" width="320" height="240"/></li>
<li><img src="img/1.jpg" width="320" height="240"/></li>
<li><img src="img/2.jpg" width="320" height="240"/></li>
<li><img src="img/3.jpg" width="320" height="240"/></li>
<li><img src="img/4.jpg" width="320" height="240"/></li>
</ul>
<ul class="count">
<li class="current">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</div>
</body>
</html>
本論文で述べたように、JavaScriptプログラムの設計に役に立ちます。