function popsup(){
myleft=(screen.width)?(screen.width-375)/2:100;mytop=(screen.height)?(screen.height-325)/2:100;
settings='top=' + mytop + ',left=' + myleft + ',width=425,height=400,location=no,directories=no,menubar=no,toolbar=no,status=no,scrollbars=no,resizable=no,fullscreen=no'
popsupwin=window.open('arbortest.html','popsupwin', settings);
popsupwin.focus();}