show（）的方向
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script class="jquery library" src="jquery-1.7.2.min.js" type="text/javascript"></script>
<title>
RunJS 演示代码
</title>
<style>
div{
border:1px solid black;
width: 100px;
height:100px;
background: #000;
display:none;
float:right;
}
</style>
<script>
$(function(){
$('.b').click(function(){
$("#div1").show(500);
})
//$("#div1").show(500);
});
</script>
</head>
<body>
<p class="b">22222222222</p>
<div id="div1">
11
</div>
</body>
</html>
