.top{
	width:1280px;
	height:611px;
	overflow:hidden;
	margin-top: 0;
	margin-right: auto;
	margin-bottom: 0;
	margin-left: auto;
  }
.main_banner1{
  background:url(imagesbanner_01.jpg) no-repeat center top;
  }
.slider{
	width:980px;
	height:99px;
	position:relative;
	background:url(imagesbar_01.png) no-repeat;
	margin-top: 512px;
	margin-right: auto;
	margin-bottom: 0;
	margin-left: auto;
  }
.slider_menu{
  width:26px;
  height:99px;
  position:absolute;
  cursor:pointer;
  top:0;
  }
.slider_menuleft{
  background:url(imagesrotaleft.gif) no-repeat;
  left:21px;
  }
.slider_menuleft:hover{
  background:url(imageson_rotaleft.gif) no-repeat;
  }
.slider_menuright{
  background:url(imagesrotaright.gif) no-repeat;
  right:21px;
  }
.slider_menuright:hover{
  background:url(imageson_rotaright.gif) no-repeat;
  }
.slider_menubar {
	height: 99px;
	display: block;
}