<script type="text/javascript">
                            function closeWindow(){
                                     var browserName=navigator.appName;
                                     if (browserName=="Netscape") {
                                         netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserWrite");
                                        window.open('','_self');
                                        window.close();
                                     } else if (browserName=="Microsoft Internet Explorer") {
                                            window.opener = "whocares"; window.close();
                                     }
                            }
                        </script>

            <input type="button" value="关闭窗口" onclick="closeWindow();" />