为什么我的背景图片不能显示出来
<!DOCTYPE html>
<html>
<head>
<title></title>
<style type="text/css">
.content{
border: 4px solid #badbdb;
}
.book{
background-color:url(D:\WebFront\img2/t_book.gif) no repeat;
}
img{
margin:10px 18px;
border: 1px solid #bladad;
}
</style>
</head>
<body>
<div class="content book">
<img src="D:\WebFront\img2\book1.jpg"/>
<img src="D:\WebFront\img2\book2.jpg"/>
<img src="D:\WebFront\img2\book3.jpg"/>
<img src="D:\WebFront\img2\book4.jpg"/>
<img src="D:\WebFront\img2\book5.jpg"/>
</div>
</body>
</html>
