.mortgage_fields { font-size:8pt; font-family:Arial,sans-serif; margin-bottom:1px; padding:0px; height:15px; border:1px solid gray; background: #FFFFFF; color: #333333; } <script> var currency_symbol = '$'; /* returns number as string in x,xxx.xx format.*/ function currency( anynum ) { if( isNaN( parseFloat( anynum ) ) ) return anynum; var tmp = '$ ' + anynum; if( tmp == '$ ' ) return ''; var absnum = Math.abs( anynum ); var intnum = Math.floor( absnum ); /* isolate integer portion*/ var intstr = intnum.toString(); var l = intstr.length; /*use a loop to insert commas - MUCH shorter and more general*/ for( var n = 1; n <= Math.floor((l-1)/3); n++ ) intstr = intstr.substring( 0,l-n*3 ) + ',' + intstr.substring( l-n*3, 999 ); var decstr = Math.round((absnum-intnum)*100).toString(); /*isolate decimal portion*/ while (decstr.length < 2) decstr = '0' + decstr; var retval = intstr; if( decstr != '00' ) retval += '.' + decstr; if (anynum < 0) retval = '(' + retval + ')'; return retval; /*var tmp_currency_symbol = (currency_symbol.length == 1 ? currency_symbol + ' ' : '');*/ /*return tmp_currency_symbol + retval;*/ /*return '<nobr>$ ' + retval + '</nobr>';*/ } /* returns an integer if possible; if value is not an integer, returns a blank string*/ function blankInt( value ) { value = '' + value; /* convert to string*/ value = value.replace(/[^0-9\.]/g, '' ); /* eliminate all non-numeric characters*/ value = value.replace(/\.\d*$/, '' ); /* eliminate the decimals, if there are any*/ var v = parseInt( value ); return isNaN( v ) ? '' : v; } /* returns a float if possible; if value is not a float, returns a blank string*/ function blankFloat( value ) { value = '' + value; /* convert to string*/ value = value.replace(/[^0-9\.]/g, '' ); /* eliminate all non-numeric characters*/ var v = parseFloat( value ); return isNaN( v ) ? '' : v; } /* Pass this function principal, rate, payments per year (ppy), and term (in years), and it will return a payment amount.*/ function get_payment( principal, rate, ppy, term) { if( principal > 0 && rate >= 0 && ppy > 0 && term > 0 ) { var ppir = parseFloat(rate)/100/parseFloat(ppy); var air = (parseFloat(rate)/100/parseFloat(ppy))+1; var tnp = parseFloat(ppy)*parseFloat(term); var ntnp = -1*parseFloat(tnp); var pa = (Math.round(100*(parseFloat(principal)/((1-Math.pow(air,ntnp))/ppir)))/100); return pa; } if( principal <= 0 ) return 0; else if( term == 0 ) return principal; else return ''; } function checkdownpayment(java_id) { var downpayment = document.getElementById('downpayment'+java_id); if( document.getElementById('downpaymenttype'+java_id).options[0].selected ) /* */ { if( blankInt(downpayment.value) > 99 ) downpayment.value='99'; } else /* */ { if( blankInt(downpayment.value) > blankInt(document.getElementById('price'+java_id).value) ) downpayment.value = blankInt(document.getElementById('price'+java_id).value); downpayment.value = currency( downpayment.value ); } } function recalc_payment(java_id) { var principal = blankInt( document.getElementById('price'+java_id).value ); var down = blankInt( document.getElementById('downpayment'+java_id).value ); var dpt = document.getElementById('downpaymenttype'+java_id); if( dpt.options[0].selected ) /* */ down = principal * down / 100; principal -= down; var rate = blankFloat( document.getElementById('rate'+java_id).value ); var ppy = 12; /* */ var term = blankInt( document.getElementById('term'+java_id).value ); var paymentdiv = document.getElementById('paymentamount'+java_id); if( principal > 0 && rate >= 0 && ppy > 0 && term > 0 ) { var pa = get_payment( principal, rate, ppy, term ); paymentdiv.innerHTML = currency_symbol + currency( blankInt( pa ) ); } else { if( principal <= 0 ) paymentdiv.innerHTML = currency_symbol + '0'; else if( term == 0 ) paymentdiv.innerHTML = currency_symbol + currency( blankInt( principal ) ); else paymentdiv.innerHTML = '&nbsp;'; /*else*/ /* alert( 'principal: ' + principal + '\nRate: ' + rate + '\nppy: ' + ppy + '\nterm: ' + term );*/ } } </script> Mortgage Calculator: Purchase Price: $ Down Payment: Percent (%) <script> if( currency_symbol == '$' ) document.write('Dollars ($)'); else if( currency_symbol == '&euro;' ) document.write('Euros (&euro;)'); else if( currency_symbol == '&x20A6;' ) document.write('Nairas (&x20A6;)'); else document.write('Currency'); </script> Dollars ($) Interest Rate: % Loan Term: years      <script>if (navigator.userAgent.indexOf( 'MSIE' ) != -1 && navigator.userAgent.indexOf( 'Mac' ) != -1) document.write('&nbsp;&nbsp;<a href="javascript:recalc_payment(\'\');">Calculate</a>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;');</script> Monthly Payment: $2,283*

* The above payment amount is based on the specified interest rate and other terms, which may not be the actual terms applicable to you and may not include all costs you have to pay.
* Do not rely on this payment amount as your final payment. <script> recalc_payment(''); </script>