var newCalc
var isMac = (navigator.appVersion.indexOf("Mac") != -1) ? true : false
 var isNav = (navigator.appName == "Netscape") ? true : false
function getCalc() {
  if(!newCalc||newCalc.closed)
  newCalc=window.open('handycalc.html','Calculator','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=no,width=345,height=210');
  newCalc.focus()
}
document.write('<form><input style="font-size:80%" type="button" value="Calculator " ; onClick="getCalc()" name="button"></font></form>');