.big_img{
	 margin-left: auto;
   margin-right: auto;
	 
	 width:1200px;
	 height:300px;
	 overflow:hidden;
	 }
#banner {float:left;position:relative; width:1200px; height:300px;}
#banner_list a{float:left;width:100%;}
#banner_list img {float:left;border:0px;width:1200px;height:300px;}

#banner_bg {position:absolute; top:0px;float:left;right:0px;margin-right:25%;height:260px;width:200px;background:url(big_tit_fxcsb.png) top left;z-index:1000;cursor:pointer; }

#banner ul {position:absolute;list-style-type:none;background:url(big_ul_fxcsb.png) top left no-repeat;height:30px;width:237px;z-index:1002;right:32%;margin:0px;padding:0px;bottom:0px;}
#banner ul li { float:left;display:block;color:#FFF;font-size:0px;cursor:pointer;background:url(big_li01_fxcsb.png) center center no-repeat;width:15px;margin-left:15px;height:15px;margin-top:10px;position:relative;left:15px;bottom:0px;}
#banner ul li.on { background:url(big_li02_fxcsb.png) center center no-repeat;}
#banner_list a{position:absolute;} /* 让四张图片都可以重叠在一起-*/