var icost
var dcost
var tcost
var perc
var revenue

function plus() {
document.forms[0].ProfitMargin.value++;
verify1();
} 

function minus() {
document.forms[0].ProfitMargin.value--;
if ((document.forms[0].ProfitMargin.value)<0) {
   alert('Please Enter Percentage Greater Than 0');
   document.forms[0].ProfitMargin.value++;
    }
else {
verify1();
    }
}

function calculate1() {
perc = document.forms[0].ProfitMargin.value;
icost = (dcost * 4);
tcost = (parseFloat(icost) + parseFloat(dcost));
revenue = Math.round((tcost/(perc/100)));
writevalues()
}

function writevalues() {
icost = Comma(icost);
tcost = Comma(tcost);
revenue = Comma(revenue);
dcost = Comma(dcost);
document.forms[0].DirectCost.value = dcost;
document.forms[0].IndirectCost.value = icost;
document.forms[0].RevenueOffset.value = revenue;
document.forms[0].TotalCost.value = tcost;
}

function verify1() {
dcost = document.forms[0].DirectCost.value;
dcost = stripCommas(dcost);
if (isNaN(dcost)) {
   alert('Please Enter Number for Direct Cost');
}   
   else {
calculate1();
        }
}

function stripCommas(numString) {
    var re = /,/g;
    return numString.replace(re,"");
}

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;
}