<style>

      .menu {

            width: 100px;

            font-size: 14px;

            font-family: "微软雅黑";

            border: 1px solid #ccc;

            z-index:;

            position: absolute;

            display: none;

            background: #f2f2f2;

        }

        .menu ul {

            margin: 0px;

            padding: 0px;

            text-align: center;

            list-style-type: none;

        }

        .menu ul li {

            padding: 3px 0px;

            font-size: 12px;

        }

        .menu ul li:hover {

            background: #e1dddd;

        }

        .menu ul li a:link {

            color: #000;

            text-decoration: none;

        }

    </style>

<!--右侧菜单-->

<div id="divmenu" class="menu">

    <ul>

        <li onclick="expand_all()" class="pub">展开所有</li>

        <li onclick="collapse_all()" class="pub">合并所有</li>

        <li onclick="zoomIn()" class="pub">画布放大</li>

        <li onclick="zoomOut()" class="pub">画布缩小</li>

        <li onclick="add_node();" class="add">新增节点</li>

        <li onclick="openWin();" class="view">预览</li>

        <li onclick="update_node();" class="update">变更</li>

        <li onclick="add_upfile();" class="upload">上传图纸</li>

        <li onclick="show_selected();" class="sel">查看节点</li>

        <li onclick="remove_node()" class="delete">删除</li>

    </ul>

</div>

<script type="text/javascript">

    $("body").bind("contextmenu", function () {

     $("#divmenu").css({ "left": document.body.scrollLeft + event.clientX - 125, "top": 

       document.body.scrollTop + event.clientY - 60 }).show();

      return false;

       });

</script>