将<li>元素隐藏在<ul>中

我需要你的帮助

如果document.getElementById("file").children[1].style.display = "none";在“文件”菜单中隐藏了“保存”项，则document.getElementById("edit").children[1].style.display = "none";无法正常工作，并且在“编辑”菜单项中也没有隐藏“添加新项”。

<div id="menuwrapper">
    <div id="menu" style="width: 1001px; height: 20px">
        <ul>
            <li>
                <a href="#nogo"><div id="div_rssims_file">File</div></a>

                <ul id="file">
                    <li><a onclick="window.print()"><div id="div_rssims_file_print">Print</div></a></li>
                    <li id="li_rssims_file_save"><a onclick="rssims_save()"><div id="div_rssims_file_save">Save</div></a></li>
                    <li><a onclick="rssims_save();window.close()"><div id="div_rssims_file_save_exit">Save & Exit</div></a></li>
                    <li><a onclick="window.close()"><div id="div_rssims_file_exit">Exit</div></a></li>
                </ul>
            </li>

            <li>
                <a href="#nogo"><div id="div_rssims_edit">Edit</div></a>

                <ul id="edit">
                    <li><a href="#nogo" onclick="rssims_addnew()"><div id="div_rssims_edit_addnew">Add new</div></a></li>
                    <li><a href="#nogo" onclick="sims_delete()"><div id="delete">Delete</div></a></li>
                    <li><a href="#nogo" onclick="sims_reset()"><div id="clear">Clear Form</div></a></li>
                </ul>
            </li>

            <li>
                <a href="#nogo"><div id="div_rssims_view">View</div></a>

                <ul>
                    <li><a href="#nogo"><div id="goto_first">&gt;&gt; Go to First</div></a></li>
                    <li><a href="#nogo"><div id="goto_next">&gt;Go to Next</div></a></li>
                    <li><a href="#nogo"><div id="goto_prev">Go to Previous&gt;</div></a></li>
                    <li><a href="#nogo"><div id="goto_last">Go to Last&gt;&gt;</div></a></li>
                </ul>
            </li>

            <li>
                <a href="#nogo"><div id="div_rssims_reports">Reports</div></a>

                <ul>
                    <li><a href="#nogo"><div id="export_excel">Export to Excel Table</div></a></li>
                    <li><a href="#nogo" onclick="sims_compile_htmltable()"><div id="export_html">Export to HTML Table</div></a></li>
                    <li><a href="#nogo" onclick="sims_compile_htmllist()"><div id="export_list">Export to HTML List</div></a></li>
                    <li><a href="#nogo" onclick="sims_compile_contactcard()"><div id="export_contact">Export as Contact Card</div></a></li>
                </ul>
            </li>

            <li>
                <a style="cursor: pointer;" onclick="sims_logoff()"><div id="div_rssims_logoff">Logoff</div></a>
            </li>
        </ul>
    </div>
</div>