### $()和css()
~~~
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
div{
width:100px;
height:100px;
border:1px solid #000;
}
</style>
</head>
<body>
<div></div>
<div id="div"></div>
<div class="box"></div>
<script type="text/javascript" src="js/jquery-1.11.1.js"></script>
<script>
$('div').css('background','red');
$('#div').css('border','2px solid blue');
$('.box').css('background','url(images/Chrysanthemum.jpg)')
</script>
</body>
</html>
~~~
***
