鼠标右键屏蔽

对于企业网站，客户有时候会有这样的需求，既页面内容不允许复制，既右键屏蔽，这里有一段简单的JS可以实现：

<script type="text/javascript">
               <!--
                if (window.Event)
                    document.captureEvents(Event.MOUSEUP);

                function nocontextmenu() {
                    event.cancelBubble = true
                    event.returnValue = false;

                    return false;
                }

                function norightclick(e) {
                    if (window.Event) {
                        if (e.which == 2 || e.which == 3)
                            return false;
                    }
                    else
                        if (event.button == 2 || event.button == 3) {
                            event.cancelBubble = true
                            event.returnValue = false;
                            return false;
                        }

                }

                document.oncontextmenu = nocontextmenu;  // for IE5+
                document.onmousedown = norightclick;  // for all others
            //-->
            </script>