.bk_center_norepeat{
background-position:top;
background-repeat:no-repeat;
}
/*新闻部分切换背景*/
.news_change_bk{
background-position:center;
background-repeat:no-repeat;
cursor:pointer;
}
.news_change_bk:active{
background-position:center;
background-repeat:no-repeat;
background-image: url(../index_images/btn_menu_active.gif);
}
/*按钮部分切换背景*/
.btn_change_bk:hover{
background-position:center;
background-repeat:no-repeat;
}
.btn_change_bk:active{
background-position:center;
background-repeat:no-repeat;
background-image: url(../index_images/btn_hov.gif);
}

.img_black_white:hover{
filter:none;
}



<!--
    body {
        margin:0;
        padding:0;
        font: bold 11px/1.5em Verdana;
}

h2 {
        font: bold 14px Verdana, Arial, Helvetica, sans-serif;
        color: #000;
        margin: 0px;
        padding: 0px 0px 0px 10px;
}

/*- Menu Tabs I--------------------------- */

    #tabsI {
      float:left;
      width:100%;
      background:#EFF4FA;
      font-size:93%;
      line-height:normal;
          border-bottom:1px solid #DD740B;
      }
    #tabsI ul {
        margin:0;
        padding:5px 5px 8px;
        list-style:none;
      }
    #tabsI li {
      display:inline;
      margin:0;
      padding:0;
      }
    #tabsI a {
      float:left;
      background:url(../index_images/tableftI.gif) no-repeat left top;
      margin:0;
      padding:0px 0 0 5px;
      text-decoration:none;
      }
    #tabsI a span {
      float:left;
      display:block;
      background:url(../index_images/tabrightI.gif) no-repeat right top;
      padding:6px 6px 6px 5px;
      color:#FFF;
      }
    /* Commented Backslash Hack hides rule from IE5-Mac \*/
    #tabsI a span {float:none;}
    /* End IE5-Mac hack */
    #tabsI a:hover span {
      color:#FFF;
      }
    #tabsI a:hover {
      background-position:0% -42px;
      }
    #tabsI a:hover span {
      background-position:100% -42px;
      }

        #tabsI #current a {
                background-position:0% -42px;
        }
        #tabsI #current a span {
                background-position:100% -42px;
        }
-->