jQuery Forum

i've lifted this from something i wrote t'other day which was working
in ie7...
    $(document).keypress(function(e){
        var key;
        if (!e)
            e = window.event
        if ((!e.charCode)|(e.charCode == 0)) {
            key = e.keyCode
        } else {
            key = e.charCode
        }
        /* put stuff here! */
    });
give it a go. it has lots of magical little quirks which can make
keypress/down/up stuff a royal pain in the arse.
a good reference (which may not be much use to your issue) is
http://www.quirksmode.org/js/keys.html

IE also had issues with $(window) over $(document) but i can't
remember exactly what the problem was.