[jQuery] window height

[kevind]

can anyone point me to where i can get the window height or viewport
height of the current window.  the code (below) in the onload event
doesn't return anything in IE 6 or Chrome but does work in FF3

i just need the height so i can adjust another element on the page to
fit in and leave a footer at the bottom of the page

$(document).ready(function(){
        // Your code here

        document.write('hello world<br>');
        document.write( $(window).height() );

});