banner_mainMenu {
position: relative;
height: 500px;
overflow: hidden;
}
.big_banner{ width:100%; position:relative;overflow:hidden; line-height:0em;}
.banner{ width:9000%; overflow:hidden; position:relative; left:0px; top:0px;}
.banner div{ margin:auto; text-align:center; float:left; }
.banner_img01bg{ background:#0a78da url(../images/banner_bg1.jpg) no-repeat center top;}
.banner_img02bg{ background:#010508 url(../images/banner_bg2.jpg) no-repeat center top;}
.banner_img03bg{ background:#010508 url(../images/banner_bg3.jpg) no-repeat center top;}
.banner_img04bg{ background:#010508 url(../images/banner_bg4.jpg) no-repeat center top;}

.banner_list_btn{ width:100%; margin:auto; height:30px; position:relative;  display:none;}

.left_btn{ position:absolute; width:53px; height:68px; left:35px; top:50%; margin-top:-35px; background:url(../images/bannerBtn.png) no-repeat 0 0px; overflow:hidden; line-height:99999px; cursor:pointer; opacity:0.5;}
.right_btn{ position:absolute;  width:53px; height:68px; right:35px; top:50%; margin-top:-35px; background:url(../images/bannerBtn.png) no-repeat 0 -72px; overflow:hidden; line-height:99999px; cursor:pointer;  opacity:0.5;}

.banner_list_btn .list_btn{ text-align: center;}
.banner_list_btn .list_btn a{ line-height:9999px;width:14px; height:17px;   background:url(../images/banner_btn.png) no-repeat 0 -34px; overflow:hidden; cursor:pointer;  display: inline-block; margin-right:4px; margin-top:6px;}
.banner_list_btn .list_btn a.hover{ background:url(../images/banner_btn.png) no-repeat 0 -51px;}
.left_btn_bg,.right_btn_bg{ display:none;}