css中Sprites的应用

body { 
 font-family: "Lucida Sans", "Lucida Sans Unicode"; 
 font-size: 14px; 
 line-height: 24px; 
} 
ul { 
 list-style-type: none; 
} 
li { 
 float: left; 

} 
a{ 
 background-image: url(bg.gif); 
 height: 26px; 
 background-position: 53px 0px; 
 display: block; 
 margin-right: 10px; 
 width: 53px; 
 text-align: center; 
 color: #333333; 
} 

li a:link { 
 text-decoration: none; 
} 
li a:visited { 
 text-decoration: none; 
} 
li a:hover { 
 text-decoration: none; 
 background-position: 0 0px;//在这里规定从某一坐标开始显示图片}