function Comma(number) {
number = '' + number;
if (number.length > 3) {
var mod = number.length % 3;
var output = (mod > 0 ? (number.substring(0,mod)) : '');
for (i=0 ; i < Math.floor(number.length / 3); i++) {
if ((mod == 0) && (i == 0))
output += number.substring(mod+ 3 * i, mod + 3 * i + 3);
else
output+= ',' + number.substring(mod + 3 * i, mod + 3 * i + 3);
}
return (output);
}
else return number;
}


function quad1(form) {
a1=eval(form.a1.value);
b1=eval(form.b1.value);

answer1a=a1*2190;
answer1b=Math.round(answer1a);
answer1=Comma(answer1b);
form.answer1.value = answer1;
if (form.answer1.value == "NaN") form.answer1.value="Insufficient data";

answer2a=answer1a*b1;
answer2b=Math.round(answer2a);
answer2=Comma(answer2b);
form.answer2.value = answer2;
if (form.answer2.value == "NaN") form.answer2.value="Insufficient data";

answer3a=answer1a/946;
answer3b=Math.round(answer3a);
answer3=answer3b;
form.answer3.value = answer3;
if (form.answer3.value == "NaN") form.answer3.value="Insufficient data";

}