function guest(URL){ if (screen.width<=800) window.open(URL,"_blank","directories=no,location=no,menubar=no,resizable=no,scrollbars=yes,status=no,titlebar=yes,toolbar=no,width=790,height=520,left=0,top=0"); else window.open(URL,"_blank","directories=no,location=no,menubar=no,resizable=no,scrollbars=yes,status=no,titlebar=yes,toolbar=no,width=790,height=520,left=100,top=100"); }