/* This script and many more are available free online at The JavaScript Source :: http://javascript.internet.com Created by: Jeremy Zongker :: http://www.destroydebt.com/ */ function ddCalc(showAmort) { if (document.getElementById('ddInitialDeposit').value=='') {alert('Please enter an initial deposit amount.'); return;} if (document.getElementById('ddContribution.value')=='') {alert('Please enter a monthly contribution amount.'); return;} if (document.getElementById('ddRate.value')=='') {alert('Please enter an assumed rate of return.'); return;} if (document.getElementById('ddYears.value')=='') {alert('Please enter either the number of years.'); return;} var mRate=(document.getElementById('ddRate').value/100)/12; var maxMonths=999999; var maxAmount=99999999999; if (document.getElementById('ddYears').value!='') maxMonths=document.getElementById('ddYears').value*12; var amort=''; //Get a decimal var currentAmount=0.1-0.1; var currentContributions=0.1-0.1; var currentInterest=0.1-0.1; currentAmount+=document.getElementById('ddInitialDeposit').value currentContributions+=document.getElementById('ddInitialDeposit').value; var monthlyAmount=Number(document.getElementById('ddContribution').value); var currentMonth=0; while (currentMonth'; } document.getElementById('ddResult').innerHTML="With an initial deposit of $" + Number(document.getElementById('ddInitialDeposit').value).toFixed(2) + ", monthly contributions of $" + monthlyAmount.toFixed(2) + " and an assumed annual interest rate of " + document.getElementById('ddRate').value + "% for " + Number(currentMonth)/12 + " years, you will earn a total of $" + Number(currentAmount).toFixed(2) + "."; if (showAmort) { document.getElementById('ddResult').innerHTML+='

Amortization Schedule
' + amort + '
MonthContributionsInterestTotal
$' + Number(currentContributions).toFixed(2) + '$' + Number(currentInterest).toFixed(2) + '$' + Number(currentAmount).toFixed(2) + '
'; } else { document.getElementById('ddResult').innerHTML+='

Show Amortization

'; } } // JavaScript Document