function launch_win(whichfile) { window.open(whichfile,'nav','location=0,resizable=0,status=1,titlebar=0,directories=0,toolbar=0,menubar=0,scrollbars=1,width=600,height=400'); }
function on(butname) { document.getElementById(butname).className='on'; }
function off(butname) { document.getElementById(butname).className='off'; }