// JavaScript Document function getInterstPayments() { var outstandingBalance = document.f.amount.value.replace(",",""); var currentInterestRate = document.f.apr.value; if (outstandingBalance == "") { alert( "Please enter the outstanding balance of your loan" ); return false ; } if (currentInterestRate == "") { alert( "Please enter the your interest rate" ); return false ; } displayInterstPayments(outstandingBalance, currentInterestRate); } function displayInterstPayments(outstandingBalance, currentInterestRate){ var B2,B4,B6; B2 = outstandingBalance; B4 = currentInterestRate/100; document.f.intonly.value = (Math.round(B2*B4*100/12))/100; } function calculate() { show('results'); var d=document.f; amount=d.amount.value; apr=d.apr.value; n=d.n.value; npy=d.npy.value; if( (amount!='') && (n!='') && (apr!='') && (npy!='') ) { tmp=Math.pow((1+(apr/100/npy)), (n*npy)); payment=(amount*tmp*(apr/100/npy))/(tmp-1); if((!isNaN(payment))&&(payment!=Number.POSITIVE_INFINITY)&&(payment!=Number.NEGATIVE_INFINITY)) { d.payment.value=round(payment); d.totpaid.value=round(payment*n*npy); d.intpaid.value=round((payment*n*npy)-amount); } else { alert('Error: One or more fields contain data\nwhich cannot be used in the calculation. \n\nCheck you have only used numbers and \ndecimal points in the text fields.'); } } else { alert('Error:\nYou did not provide enough data.'); } } function round(val) { tmp=Math.round(val*100)/100+''; if(tmp.indexOf('.')==-1)tmp+='.00'; else if(tmp.length-tmp.indexOf('.')==2)tmp+='0'; return tmp; } function resetall() { var d=document.f; d.amount.value=''; d.apr.value=''; d.n.value=''; d.npy.value=12; d.payment.value=''; d.totpaid.value=''; d.intpaid.value=''; d.amount.focus(); } function printer() { if((navigator.appVersion.indexOf("4.") != -1) && (navigator.appName.indexOf("Netscape") != -1)){ print();} } function buildtable() { tablebuilt=true; txt='Payment Schedule
'; txt+='

to print this table, right-click with your mouse and
select print from the context menu...

'; txt+=''; txt+=''; amount=eval(amount); for(i=1;i<=n*npy;i++) { tbldata=''+tbldata+i+':'+tbldata+round(payment)+''+tbldata+round(principle)+''+tbldata+round(interest)+''+tbldata+round(amount)+''; } txt+='
Payment
Number		Monthly
payment		Principal
amount		Interest
amount		Remaining
balance
'; interest=amount*apr/npy/100; amount+=interest; principle=payment-interest; amount-=payment; txt+='


'; var psch=window.open('', 'viewsch' ,'top=0,left=0,toolbar=no,scrollbars=yes,resizable=yes,width=500,height=450,menubar=no,status=no'); psch.document.write(txt); }