function startCalc() {
  	interval = setInterval("calc()",1);
	}

function calc() {
  one = $("firstBox").value;
  two = $("secondBox").value;
  three = $("thirdBox").value;
  four = $("fourthBox").value;
  five = $("fifthBox").value;
  six = $("sixthBox").value;
  seven = $("seventhBox").value;
  eight = $("eighthBox").value;
  nine = $("ninthBox").value;
  ten = $("tenthBox").value;
  $("eleventhBox").value = (one * 1) + (two * 1) + (three * 1) + (four * 1) + (five * 1) + (six * 1) + (seven * 1) + (eight * 1) + (nine * 1) + (ten * 1);
}

function stopCalc() {
  clearInterval(interval);
}