function getKeyCode( e ) {
    var keynum;
    if(window.event) 
    {
        keynum = e.keyCode
    }
    else if(e.which) 
    {
        keynum = e.which
    }
    return keynum;
}

function keypressWindowOpen( e, location ) {
    if (getKeyCode(e)==13) { window.open(location.href); return false; }
}