Hiding an element in a

Hiding an element in a

I need your help
If
document.getElementById("file").children[1].style.display = "none" //Save
Hides the Save item, then
document.getElementById("edit").children[1].style.display = "none" //Add new
does not work properly and does not hide my edit menu item.
<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>