Milonic JavaScript Menu

That correctly positions it on left, but does not seem to resize the menus across the remainder of the screen.

Also, I am getting some errors on my page.

I want my menus to be offset from the left by 350 pixels, but then take up 100% of the remaining screen by resizing the space between menu items. I have done it with another script (but that script causes problems with by DIV alignment on other pages).

In other words, itemwidth becomes a variable ...