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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>sample</title>
</head>
<style >
/* 本页的CSS样式表 */
.reveal * {display: none;}
/* class="reveal"的元素的字元素都不显示 */
.reveal *.handle {display: block;}
/* 除了class="handle"的元素 */
</style>
<script type="text/javascript">
//所有的页面逻辑在onload事件以后启动
window.onload = function(){
// 找到所有class名为"reveal"的容器元素
var elements = document.getElementsByClassName("reveal");
for (var i = 0; i < elements.length; i++) { //对每个元素进行遍历
var elt = elements[i];
//找到容器中的"handle"元素
var title = elt.getElementsByClassName("handle")[0];
//当单击这个元素时，显现剩下的内容
addRevealHandler(title,elt);
function addRevealHandler(title,elt){
title.onclick = function(){
if(elt.className == "reveal")
elt.className = "revealed";
else if(elt.className = "revealed")
elt.className = "reveal";
}
}
}
}
</script>
<body>
<div class="reveal">
<h1 class="handle">Click Here to Reveal Hidden Text</h1>
<p>This .......................</p>
</div>
</body>
</html>