a causa della lunghezza del codice ho diviso in due:

ecco il restante:

//----------------------------------------------------------------------------
// Code to initialize menus.
//----------------------------------------------------------------------------

function menuInit(menu) {

var itemList, spanList;
var textEl, arrowEl;
var itemWidth;
var w, dw;
var i, j;

// For IE, replace arrow characters.

if (browser.isIE) {
menu.style.lineHeight = "2.5ex";
spanList = menu.getElementsByTagName("SPAN");
for (i = 0; i < spanList.length; i++)
if (hasClassName(spanList[i], "menuItemArrow")) {
spanList[i].style.fontFamily = "Webdings";
spanList[i].firstChild.nodeValue = "4";
}
}

// Find the width of a menu item.

itemList = menu.getElementsByTagName("A");
if (itemList.length > 0)
itemWidth = itemList[0].offsetWidth;
else
return;

// For items with arrows, add padding to item text to make the
// arrows flush right.

for (i = 0; i < itemList.length; i++) {
spanList = itemList[i].getElementsByTagName("SPAN");
textEl = null;
arrowEl = null;
for (j = 0; j < spanList.length; j++) {
if (hasClassName(spanList[j], "menuItemText"))
textEl = spanList[j];
if (hasClassName(spanList[j], "menuItemArrow")) {
arrowEl = spanList[j];
}
}
if (textEl != null && arrowEl != null) {
textEl.style.paddingRight = (itemWidth
- (textEl.offsetWidth + arrowEl.offsetWidth)) + "px";

// For Opera, remove the negative right margin to fix a display bug.

if (browser.isOP)
arrowEl.style.marginRight = "0px";
}
}

// Fix IE hover problem by setting an explicit width on first item of
// the menu.

if (browser.isIE) {
w = itemList[0].offsetWidth;
itemList[0].style.width = w + "px";
dw = itemList[0].offsetWidth - w;
w -= dw;
itemList[0].style.width = w + "px";
}

// Fix the IE display problem (SELECT elements and other windowed controls
// overlaying the menu) by adding an IFRAME under the menu.

if (browser.isIE) {
var iframeEl = document.createElement("IFRAME");
iframeEl.frameBorder = 0;
iframeEl.src = "javascript:;";
iframeEl.style.display = "none";
iframeEl.style.position = "absolute";
iframeEl.style.filter = "progidXImageTransform.Microsoft.Alpha(style=0,opacity=0) ";
menu.iframeEl = menu.parentNode.insertBefore(iframeEl, menu);
}

// Mark menu as initialized.

menu.isInitialized = true;
}

//----------------------------------------------------------------------------
// General utility functions.
//----------------------------------------------------------------------------

function getContainerWith(node, tagName, className) {

// Starting with the given node, find the nearest containing element
// with the specified tag name and style class.

while (node != null) {
if (node.tagName != null && node.tagName == tagName &&
hasClassName(node, className))
return node;
node = node.parentNode;
}

return node;
}

function hasClassName(el, name) {

var i, list;

// Return true if the given element currently has the given class
// name.

list = el.className.split(" ");
for (i = 0; i < list.length; i++)
if (list[i] == name)
return true;

return false;
}

function removeClassName(el, name) {

var i, curList, newList;

if (el.className == null)
return;

// Remove the given class name from the element's className property.

newList = new Array();
curList = el.className.split(" ");
for (i = 0; i < curList.length; i++)
if (curList[i] != name)
newList.push(curList[i]);
el.className = newList.join(" ");
}

function getPageOffsetLeft(el) {

var x;

// Return the x coordinate of an element relative to the page.

x = el.offsetLeft;
if (el.offsetParent != null)
x += getPageOffsetLeft(el.offsetParent);

return x;
}

function getPageOffsetTop(el) {

var y;

// Return the x coordinate of an element relative to the page.

y = el.offsetTop;
if (el.offsetParent != null)
y += getPageOffsetTop(el.offsetParent);

return y;
}