/* This script and many more are available free online at
The JavaScript Source!! http://javascript.internet.com
*/
function startCalc(){
  interval = setInterval("calc()",1);
}
function calc(){
  one = document.autoSumForm.price.value;
  two = document.autoSumForm.delivery.value; 
  three = document.autoSumForm.installation.value; 
  document.autoSumForm.subtotal.value = Math.round ((one * 1) + (two * 1) + (three * 1));
  document.autoSumForm.tax.value = (one * 0.0825) + (two * 0.0825) + (three * 0.0825);
  document.autoSumForm.totalcharge.value = (one * 1) + (two * 1) + (three * 1) + (one * .0825) + (two * .0825) + (three * .0825);
}
function stopCalc(){
  clearInterval(interval);
}