How to read the width from your browser?

How can i read the width from your document in your browser?
I am using VbScript.

Example:

Dim DocWidth

DocWidth = Document.Width

This doesnt work.

[Mark Sreeves]

Here's a couple of Client-side javascript functions

I never use client-side vb-script.

function docHeight() {   
if (document.all) 
       return document.body.offsetHeight
    else if (document.layers)
       return document.body.document.height;

}
function docWidth() {   
if (document.all) 
       return document.body.offsetWidth
    else if (document.layers)
       return document.body.document.width;

}

Thank you..

Const minwidth = 42

function window_onresize()
  cmdNextPage.runtimeStyle.posWidth = _
    (document.body.offsetWidth - clng(minwidth))
End function

This was the one (document.body.offsetWidth) that i was looking for.