<!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>
<title>控制div显示的样式.</title>
<style type="text/css">
div
{
200px;
height: 500px;
background-color: Blue;
overflow: hidden;
}
</style>
<script type="text/javascript">
//加载事件
window.onload = function () {
//1.btnShow注册点击事件
document.getElementById('btnShow').onclick = function () {
document.getElementById('dv').style.display = '';
}
//2.btnHidden注册点击事件
document.getElementById('btnHidden').onclick = function () {
document.getElementById('dv').style.display = 'none';
}
//3.btnSlowHidden注册点击事件
document.getElementById('btnSlowHidden').onclick = function () {
var dvobj = document.getElementById('dv');
var intervalId = setInterval(function () {
//3.1获得层的高度.
var h = dvobj.clientHeight;
// console.log(h);原来差别在这里,是需要点击html显示的
//页面,才能进入..调试代码框.
//判断,如果层小于等于零.则设置层样式为none.否则渐隐
if (h <= 0) {
dvobj.style.display = 'none';
clearInterval(intervalId);
} else {
dvobj.style.height = h - 5 + 'px';
}
}, 100);
}
//4.btnSlowShow注册点击事件
document.getElementById('btnSlowShow').onclick = function () {
var dvobj = document.getElementById('dv');
var intervalId = setInterval(function () {
//3.1获得层的高度.
var h = dvobj.clientHeight;
//判断,如果层小于等于500.则让高度累加.直到达到设定高度,显示层.并终止setInterval事件.
if (h <= 500) {
dvobj.style.height = h + 5 + 'px';
} else {
dvobj.style.display = '';
clearInterval(intervalId);
}
}, 100);
}
}
</script>
</head>
<body>
<input type="button" name="name" value="渐隐" id="btnSlowHidden" />
<input type="button" name="name" value="渐显" id="btnSlowShow" />
<input type="button" name="name" value="显示" id="btnShow" />
<input type="button" name="name" value="隐藏 " id="btnHidden" />
<div id="dv">
委托和事件
<br />
泛型<br />
通信<br />
显示<br />
</div>
xxxxxxxxxxxx
</body>
</html>