<!----- Script copyright ©  1997  S.Chris Brown (Spikeman)   http://www.geocities.com/BourbonStreet/3843-->
/********************************************************
**       S.Christopher Brown's (Spikeman)'s            **
**           java script  circle math for              **
**          Area & Diameter & Circumfrence             **
**    copyright © 1997 S.Chris Brown (Spikeman)        **
**                spikeman@myself.com                  **
**   http://www.geocities.com/BourbonStreet/3843       **
**               All Rights Reserved                   **
**  You can freely use this script, if this credit is  **
**     included in the source. This Script is for      **
**   noncommercial use only. and has been placed in    **
**   The public domain and no fees can be charged in   **
**     conjunction with distribution or use.           **
**                  Thank you                          ** 
********************************************************/ 
// This JavaScript code Originally by S.Chris Brown  (Spikeman) 1997 ( http://www.geocities.com/BourbonStreet/3843 )    
function circle(form,changed) {
with (Math) {
var area = form.area.value;
var diameter = form.diameter.value;
var circumfrence = form.circumfrence.value;
if (changed == "area") {
var radius = sqrt(area / PI);
diameter = 2 * radius;
circumfrence = PI * diameter;
}
if (changed == "diameter") {
area = PI * (diameter / 2) * (diameter / 2);
circumfrence = PI * diameter;
}
if (changed == "circumfrence") {
diameter = circumfrence / PI;
area = PI * (diameter / 2) * (diameter / 2);
       }
form.area.value = area;
form.diameter.value = diameter;
form.circumfrence.value = circumfrence;
  }
}
var toDegrees = 360 / (Math.PI * 2);
var toRadians = (Math.PI * 2) / 360;
function about()
{
alert(" About for Spikeman\'s JavaScript Circle Math For \n            Area & Diameter & Circumfrence     \n\n This Was Made to help people get the Area,Diameter or \n              Circumfrence with one of values.. \n    ");
alert("\n            Spikeman\'s Circle Math For \n       Area & Diameter & Circumfrence    \n\n                       © 1997 Spikeman  \n                 spikeman@myself.com\nhttp://www.geocities.com/BourbonStreet/3843")
}
function help()
{
alert(" Help for Spikeman\'s JavaScript Circle Math For \n            Area & Diameter & Circumfrence     \n\n Inserisci un numero in una delle caselle di testo  \n Poi clicca su un' altra casella di testo \n E avrai i valori di quel numero \n    ");
}
//------------->