问题描述:
请高人解释下这些css代码小弟刚学有些东西不理解
#zishu li{ float:left; margin-left:5px; margin-top:50px;}
.nav_a a:link,.nav_a a:visited{text-decoration:none; display:block; padding-right:10px; background:url(http://www.zishu.cn/attachments/month_0702/v200721005948.gif) no-repeat right top;margin-top:3px; color:#000; float:left;}
.nav_a span{cursor:hand;background-color:#DBF0C4; font-size:14px;background:url(http://www.zishu.cn/attachments/month_0702/x200721005941.gif) no-repeat; display:block; line-height:29px; padding-left:10px; cursor:hand; float:left;}
.nav_a a:hover,.nav_a active{text-decoration:none; display:block; padding-right:10px; background:url(http://www.zishu.cn/attachments/month_0702/v200721005948.gif) no-repeat right bottom;margin-top:0px; color:#000}
.nav_a a:hover span,.nav_a a:active span{background-color:#DBF0C4; font-size:14px;background:url(http://www.zishu.cn/attachments/month_0702/x200721005941.gif) no-repeat left bottom; display:block; line-height:29px; padding-left:10px; margin-top:0px; padding-top:1px; padding-bottom:2px; cursor:hand;}
#box{ background:#009900; height:4px; overflow:hidden; clear:both}
#zishu li{ float:left; margin-left:5px; margin-top:50px;}
.nav_a a:link,.nav_a a:visited{text-decoration:none; display:block; padding-right:10px; background:url(http://www.zishu.cn/attachments/month_0702/v200721005948.gif) no-repeat right top;margin-top:3px; color:#000; float:left;}
.nav_a span{cursor:hand;background-color:#DBF0C4; font-size:14px;background:url(http://www.zishu.cn/attachments/month_0702/x200721005941.gif) no-repeat; display:block; line-height:29px; padding-left:10px; cursor:hand; float:left;}
.nav_a a:hover,.nav_a active{text-decoration:none; display:block; padding-right:10px; background:url(http://www.zishu.cn/attachments/month_0702/v200721005948.gif) no-repeat right bottom;margin-top:0px; color:#000}
.nav_a a:hover span,.nav_a a:active span{background-color:#DBF0C4; font-size:14px;background:url(http://www.zishu.cn/attachments/month_0702/x200721005941.gif) no-repeat left bottom; display:block; line-height:29px; padding-left:10px; margin-top:0px; padding-top:1px; padding-bottom:2px; cursor:hand;}
#box{ background:#009900; height:4px; overflow:hidden; clear:both}
问题解答:
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