jquery简单实现鼠标经过导航条改变背景图

复制代码代码如下:

<!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> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>维护中...</title> 
<style> 
*{ 
margin:0; 
padding:0; 
} 
body{ 
text-align:center; 
background:yellow; 
} 
#container{ 
width:962px; 
height:auto; 
background:url(b3.jpg); 
margin:0px auto; 
} 
#head{ 
height:100px; 
width:100%; 
} 
.head_ul{ 
list-style:none; 
margin-left:200px; 
} 
.head_ul li{ 
float:left; 
width:90px; 
height:50px; 
line-height:40px; 
font-size:20px; 
margin-top:40px; 
background:url(b1.png); 
} 
.head_ul li a{ 
text-decoration:none; 
} 

#main{ 
width:100%; 
height:1500px; 
} 
#left{ 
width:30%; 
height:100%; 
float:left; 
} 
#right{ 
width:70%; 
height:100%; 
float:left; 
} 
#clear{ 
clear:both; 
} 
#foot{ 
height:100px; 
width:100%; 
} 

</style> 
<script src="jquery-1.7.2.js"></script> 
<script> 
$(function(){ 
$(".head_ul li").hover(function(){ 
$(this).css('background','url(b2.png)'); 
},function(){ 
$(this).css('background','url(b1.png)'); 
} 
); 
}); 

</script> 
</head> 
<body> 
<div id="container"> 
<div id="head"> 
<ul class="head_ul"> 
<li><a href="#">首页</a></li> 
<li><a href="#">首页</a></li> 
<li><a href="#">首页</a></li> 
<li><a href="#">首页</a></li> 
<li><a href="#">首页</a></li> 
<li><a href="#">首页</a></li> 
</ul> 
</div> 

<div id="main"> 
<div id="left"></div> 
<div id="right"></div> 
<div id="clear"></div> 
</div> 

<div id="foot"></div> 
</div 
</body> 
</html> 