clickbgimage - if you set this with an image that is what bg image will be used when the any item using this style is clicked.

clickclass - use css to set the items' properties when clicked, as far as I know any valid 'logical' css property can be used, so text-decoration;font-size;font-family, font-style, font-weight, padding [not margin] color, background-color; background-image and so on.

clickseparatorimage was designed for use with tab style menus, it will probably work with any item you have set to work with a click

disabled - type=disabled disables an item so it will not function

dividespan - I don't know

dragable is to make menus dragable/moveable, see the sample for this

fileimage - I don't know

hotkey - I don't know

id - developers can add their own ID's to menu items

imageurl - I don't know, though it seems obvious

leftimage - its matching item is rightimage. Setting these will put the named images on the right and left of you text in each item.

menubgcolor - this sets the background color of the whole menu, not the items, items use of/on bgcolor  menubgcolor is a 'static' property, it's  the same no matter what the mouse state

menustyle  - allows a different menu style to be applied to one item

nowrap - can set it to on or off to allow or stop wrapping

opendelay - let's you set a delay for the opening of a menu

overflow - overflow="scroll"; sets property so any menu that is longer than available space will get scroll bars instead of going beyond page

overpageimage  - sets a pageimage for the mouseover state so that it doesn't use the overimage as its mouseover

overseparatorimage  sets separatorimage for the mouseover state

pageoncolor - sets color for mouseon state when page properties are used to highlight and show where one is in the menu structure

pageseparatorimage - sets the separatorimage when page properties are used to show menu highlighting
 
pagesubimage sets page subimage when using page properties to show menu highlighting

rightimage - its companion is leftimage. Setting these will put the named images on the right and left of the text in each item.

targetfeatures to set the features of the target window, for example when using target=new; to open a new window

tipdelay - sets the delay for showing a tooltip when mouseover 

tipfollow  - tipfollow=1; sets the tip so it will follow the mouse movement

tipmenu=name of tooltip menu, telling the menu which tooltip to open when mouesover

tooltip   tooltip= text of tooltip

example: http://www.milonic.com/tooltips.php

aI("text=Difference Tooltip Styles using Bubbles, that moves with the mouse;tooltip=I\\'m a Sample ToolTip viewable inside a Bubble Image, that moves with the mouse;tipmenu=bubbleTip;tipfollow=1");

imageborderwidth - let's you set the width of an image border, if you have an image in an item and want a border to show.

divides - divides the menu. For example a horizontal menu set with divides=2 and 10 items will be divided into two rows, the top row being items 1-5 and bottom 6-10. A vertical menu with 10 items and divides=2 will divide into two columns, the left column being odd numbered items and right being even numbered items.

[dividespan which is a style or item property is probably to do something similar with an item????]

ignorecollision=true/false 1/0  has the menu ignore the built in page edge/top/bottom feature

maxwidth - sets the maximum width of the menu

menualign - let's say you have a 100% menu but the items only = 60% of the menu span, menualign will let you align the items, left, center, right

menuheight - sets the menu height, item heights can be less than this

menuwidth - sets menu width, pixels or %

minwidth - sets the minimum width

mm_fixheight - allows you to specify whether you want your vertical menu items to use 100% height when specifying a menu height. This is useful if you want to use the menu inside a CMS that declares 100% height objects.

opendelay - sets the opening delay for a menu

openstyle - openstyle is used to determine how the menu will appear. an openstyle of "rtl" will force the menu to display in a right to left fassion, useful for use on web sites in Hebrew for example.

..............Openstyle can also be use to force menus to open upwards or to the left side of the menu. the property for this is openstyle="up" or openstyle="forceleft";

outfilter - only works for IE, it sets the transitions and filters

resizable - I know what it means, have no idea what it does, I guess resize the menu...

zindex - again I know what it means, not sure how you'd use it, I guess you can set the zindex of a menu for whatever reason.