#theader {	     width: 100%;
                 margin: 0px;
                 padding: 0px;

                 font-family: "宋体";
                 font-size: 12px;
                }
                #uMenu {
                 margin: 0px;
                 padding: 0px;
                 list-style-type: none;
                }
                #uMenu li {
                 display: block;
                 width: 94px;
                 text-align: center;
                 float: left;
                 margin: 0px;
                 padding-top: 0.2em;
                 padding-right: 0px;
                 padding-bottom: 0.2em;
                 padding-left: 0px;
                 cursor: hand;
                }
                .sec1 { background-image:url(images/aaa.png);}
                .sec2 { background-image:url(images/bbb.png);}
                .block { display: block;}
                .unblock { display: none;}