hover切换(显示/隐藏)
网站常用效果之一，以下为简化版，用于学习javascript基础知识。
效果图：
hover显示/隐藏切换 - 纯JS简化版
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>hover显示/隐藏切换 - 纯JS简化版</title>
<style type="text/css">
*{margin: 0; padding: 0;}
#hoverbox {margin:10px; 500px;}
#hovertit {background: #666; padding: 10px;color: #fff;}
#hoverdiv { display: none; border: 1px solid #666; padding: 10px;}
</style>
<script type="text/javascript">
window.onload = function() {
var hovertit = document.getElementById('hovertit');
var hoverdiv = document.getElementById('hoverdiv');
hovertit.onclick = function() {
//hoverdiv.style.display = hoverdiv.style.display == 'block' ? 'none' : 'block';
if(hoverdiv.style.display == 'block') {
hoverdiv.style.display = 'none';
} else {
hoverdiv.style.display = 'block';
}
}
}
</script>
</head>
<body>
<div class="hoverbox">
<div id="hovertit">小标题一</div>
<div id="hoverdiv">小标题内容一</div>
</div>
</body>
</html>
hover显示/隐藏切换[版本二]
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>hover显示/隐藏切换 - 纯JS简化版</title>
<style type="text/css">
*{margin: 0; padding: 0;}
.hoverbox {margin:10px; 500px;}
.hovertit {background: #666; padding: 10px;color: #fff;}
.hoverdiv { display: none; border: 1px solid #666; padding: 10px;}
</style>
<script type="text/javascript">
window.onload = function() {
function getClass(elem, elements) {
var tags = elem.getElementsByTagName('*');
var arr = [];
for(var i=0; i<tags.length; i++) {
if(tags[i].className == elements) {
arr.push(tags[i]);
}
}
return arr;
}
var hoverbox = getClass(document, 'hoverbox');
for(var b=0; b<hoverbox.length; b++) {
getClass(hoverbox[b], 'hovertit')[0].index = b;
getClass(hoverbox[b], 'hovertit')[0].onclick = function() {
if(getClass(hoverbox[this.index], 'hoverdiv')[0].style.display == 'block') {
getClass(hoverbox[this.index], 'hoverdiv')[0].style.display = 'none';
} else {
getClass(hoverbox[this.index], 'hoverdiv')[0].style.display = 'block'
}
//getClass(hoverbox[this.index], 'hoverdiv')[0].style.display = getClass(hoverbox[this.index], 'hoverdiv')[0].style.display == 'block' ? 'none' : 'block';
}
}
}
</script>
</head>
<body>
<div class="hoverbox">
<div class="hovertit">小标题一</div>
<div class="hoverdiv">小标题内容一</div>
</div>
<div class="hoverbox">
<div class="hovertit">小标题二</div>
<div class="hoverdiv">小标题内容二</div>
</div>
</body>
</html>