Simple Javascript Expanding Menu doesnt work

JavaScript
1

The code i have used is from here :-

http://javascript.internet.com/navigation/expanding-menu.html

I use it on this page :-

http://i-newmedia.com/spi/productTEST.html

As you can see when you click on the prodiuct nav on the bottom right. clcik on’RESISTORS’ and then clcik on the Menu Itme 1 and it drops down to show the sub menu. If you click o ‘CAPACITORS’ the menu item 1 shows but you cannot click on it.

Is there a fix for this so i can use the submenu dropdown on all of the other categories in my product index?

Here is the original code I used :-

<!-- Paste this code into the CSS section of your HTML document –>

ul#menu {
width: 100px;
list-style-type: none;
border-top: solid 1px #b9a894;
margin: 0;
padding: 0;
}

ul#menu ol {
display: none;
text-align: right;
list-style-type: none;
margin: 0;
padding: 5px;
}

ul#menu li,
ul#menu a {
font-family: verdana, sans-serif;
font-size: 11px;
color: #785a3c;
}

ul#menu li {
border-bottom: solid 1px #b9a894;
line-height: 15px;
}

ul#menu ol li {
border-bottom: none;
}

ul#menu ol li:before {
content: "- ";
}

ul#menu a {
text-decoration: none;
outline: none;
}

ul#menu a:hover {
color: #539dbc;
}

ul#menu a.active {
color: #be5028;
}

<!-- Paste this code into an external JavaScript file named: expandingMenu.js –>

/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Travis Beckham :: http://www.squidfingers.com | http://www.podlob.com
version date: 06/02/03 :: If want to use this code, feel free to do so,
but please leave this message intact. (Travis Beckham) */

// Node Functions

if(!window.Node){
var Node = {ELEMENT_NODE : 1, TEXT_NODE : 3};
}

function checkNode(node, filter){
return (filter == null || node.nodeType == Node[filter] || node.nodeName.toUpperCase() == filter.toUpperCase());
}

function getChildren(node, filter){
var result = new Array();
var children = node.childNodes;
for(var i = 0; i < children.length; i++){
if(checkNode(children[i], filter)) result[result.length] = children[i];
}
return result;
}

function getChildrenByElement(node){
return getChildren(node, “ELEMENT_NODE”);
}

function getFirstChild(node, filter){
var child;
var children = node.childNodes;
for(var i = 0; i < children.length; i++){
child = children[i];
if(checkNode(child, filter)) return child;
}
return null;
}

function getFirstChildByText(node){
return getFirstChild(node, “TEXT_NODE”);
}

function getNextSibling(node, filter){
for(var sibling = node.nextSibling; sibling != null; sibling = sibling.nextSibling){
if(checkNode(sibling, filter)) return sibling;
}
return null;
}
function getNextSiblingByElement(node){
return getNextSibling(node, “ELEMENT_NODE”);
}

// Menu Functions & Properties

var activeMenu = null;

function showMenu() {
if(activeMenu){
activeMenu.className = “”;
getNextSiblingByElement(activeMenu).style.display = “none”;
}
if(this == activeMenu){
activeMenu = null;
} else {
this.className = “active”;
getNextSiblingByElement(this).style.display = “block”;
activeMenu = this;
}
return false;
}

function initMenu(){
var menus, menu, text, a, i;
menus = getChildrenByElement(document.getElementById(“menu”));
for(i = 0; i < menus.length; i++){
menu = menus[i];
text = getFirstChildByText(menu);
a = document.createElement(“a”);
menu.replaceChild(a, text);
a.appendChild(text);
a.href = “#”;
a.onclick = showMenu;
a.onfocus = function(){this.blur()};
}
}

if(document.createElement) window.onload = initMenu;

<!-- Paste this code into the HEAD section of your HTML document.
You may need to change the path of the file. –>

<script type=“text/javascript” src=“expandingMenu.js”></script>

<!-- Paste this code into the BODY section of your HTML document –>

<ul id=“menu”>
<li>Menu Item 1
<ol>
<li><a href=“#”>Sub Item 1.1</a></li>
<li><a href=“#”>Sub Item 1.2</a></li>
<li><a href=“#”>Sub Item 1.3</a></li>
</ol>
</li>
<li>Menu Item 2
<ol>
<li><a href=“#”>Sub Item 2.1</a></li>
<li><a href=“#”>Sub Item 2.2</a></li>
<li><a href=“#”>Sub Item 2.3</a></li>
</ol>
</li>
<li>Menu Item 3
<ol>
<li><a href=“#”>Sub Item 3.1</a></li>
<li><a href=“#”>Sub Item 3.2</a></li>
<li><a href=“#”>Sub Item 3.3</a></li>
</ol>
</li>
<li>Menu Item 4
<ol>
<li><a href=“#”>Sub Item 4.1</a></li>
<li><a href=“#”>Sub Item 4.2</a></li>
<li><a href=“#”>Sub Item 4.3</a></li>
</ol>
</li>
<li>Menu Item 5
<ol>
<li><a href=“#”>Sub Item 5.1</a></li>
<li><a href=“#”>Sub Item 5.2</a></li>
<li><a href=“#”>Sub Item 5.3</a></li>
</ol>
</li>
</ul>
<p><div align=“center”>
<font face=“arial, helvetica” size"-2">Free JavaScripts provided<br>
by <a href=“http://javascriptsource.com”>The JavaScript Source</a></font>
</div><p>

thanks in advance guys!