1. 建立一個CSS檔案
#sddm{margin: 0 auto;padding: 0;z-index: 30;background-color:#ddeafb;width: 800px;height:26px;}#sddm li{margin: 0;padding: 0;list-style: none;float: left;font: bold 12px arial}#sddm li a{display: block;margin: 0 1px 0 0;padding: 4px 10px;width: 160px;background: #5970B2;color: #FFF;text-align: center;text-decoration: none}#sddm li a:hover{ background:#7FFFD4;}#sddm div{position: absolute;visibility: hidden;margin: 0;padding: 0;background: #EAEBD8;border: 1px solid #5970B2}#sddm div a{position: relative;display: block;margin: 0;padding: 5px 10px;width: auto;white-space: nowrap;text-align: left;text-decoration: none;background: #EAEBD8;color: #2875DE;font: 12px arial}#sddm div a:hover{ background: #49A3FF;color: #FFF}
在html或者JSP檔案的body中加入
<body style="text-align:center">
<ul id="sddm"><li><a href="#" onMouseOver="mopen('m1')" onMouseOut="mclosetime()">設定檔</a><div id="m1" onMouseOver="mcancelclosetime()" onMouseOut="mclosetime()"> <a href="student_detail.jsp">個人資訊</a> <a href="student_main.jsp">個人通知</a></div></li><li><a href="#" onMouseOver="mopen('m2')" onMouseOut="mclosetime()">論文題目</a><div id="m2" onMouseOver="mcancelclosetime()" onMouseOut="mclosetime()"> <a href="title_select.jsp">線上選題</a> <a href="student_title_detail.jsp">個人題目</a> <a href="student_teacher_detail.jsp">個人指導教師資訊</a></div></li><li><a href="#" onMouseOver="mopen('m3')" onmouseout="mclosetime()">論文進程</a><div id="m3" onMouseOver="mcancelclosetime()" onMouseOut="mclosetime()"> <a href="student_doc_select.jsp">編輯文檔</a> <a href="student_doc_fastsave.jsp">本地上傳文檔</a> </div></li><li><a href="#" onMouseOver="mopen('m4')" onMouseOut="mclosetime()">下載協助</a><div id="m4" onMouseOver="mcancelclosetime()" onMouseOut="mclosetime()"> <a href="down_center.jsp">下載支援</a><a href="help.jsp">協助說明</a></div></li></ul><div style="clear:both"></div>
</body>