<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title></title>
<link rel="stylesheet" href="imooc.css" type="text/css">
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
</head>
<body>
<h2>可见性筛选选择器</h2>
<h3>:visible/:hidden</h3>
<div class="left">
<div class="div">
<a>display</a>
<p id="div1" style="display:none;">display</p>
</div>
<div class="div">
<a>width</a>
<a>height</a>
<p id="div2" style="width:0;height:0">width/height</p>
</div>
<div class="div">
<a>visibility</a>
<a>opacity</a>
<p id="div3" style="visibility:hidden;opacity:0">visibility</p>
</div>
</div>
<p id="show"></p>
<script type="text/javascript">
function show (ele) {
if (ele instanceof jQuery) {
$("#show").html('元素的长度的 = ' + ele.length)
} else {
alert(ele+' 不是jQuery对象')
}
}
</script>
<script type="text/javascript">
//查找id = div1的DOM元素,是否可见
show( ? );
</script>
<script type="text/javascript">
//查找id = div2的DOM元素,是否可见
show( ? );
</script>
<script type="text/javascript">
//查找id = div3的DOM元素,是否可见
show( ? );
</script>
<script type="text/javascript">
//查找id = div1的DOM元素,是否隐藏
show( ? );
</script>
<script type="text/javascript">
//查找id = div2的DOM元素,是否隐藏
show( ? );
</script>
<script type="text/javascript">
//查找id = div3的DOM元素,是否隐藏
show( ? );
</script>
</body>
</html>
.left {
width: auto;
height: 120px;
}
.left div {
width: 100px;
height: 70px;
padding: 5px;
margin: 5px;
float: left;
background: #bbffaa;
border: 1px solid #ccc;
}
.bottom {
width: 800px;
}
.bottom div,
.bottom span {
display: block;
width: 80px;
height: 80px;
margin: 5px;
background: #bbffaa;
float: left;
font-size: 14px;
}
.bottom .small {
width: 60px;
height: 25px;
font-size: 12px;
background: #fab;
}
