if(typeof com != 'object') com = {}; if(typeof com.ivivos != 'object') com.ivivos = {}; if(typeof com.ivivos.AmortizationCalculator != 'object') { com.ivivos.AmortizationCalculator = new function () { this.UNSOLVABLE_ERROR = {} this.solveFor_x = function (P, D, i, N) {return (P-D)*(((1-(1+i))/(1-Math.pow(1+i,N)))+i);} this.solveFor_N = function (P, D, i, x) {return Math.log(((1-(1+i))/((x/(P-D))-i)-1)/-1)/Math.log(1+i);} this.solveFor_D = function (P, i, N, x) {return P - (x / (((1-(1+i))/(1-Math.pow(1+i,N)))+i));} this.solveFor_P = function (D, i, N, x) {return (x / (((1-(1+i))/(1-Math.pow(1+i,N)))+i)) + D;} this.solve = function(frm, P, D, i, N, x, f) { P = parseFloat(P); D = parseFloat(D); i = parseFloat(i); N = parseFloat(N); x = parseFloat(x); if(isNaN(P) && !( isNaN(D) || isNaN(i) || isNaN(N) || isNaN(x) )) { P = this.solveFor_P(D, i, N, x); frm.P.value = Math.round(P * 100) / 100; } else if(isNaN(D) && !( isNaN(P) || isNaN(i) || isNaN(N) || isNaN(x) )) { D = this.solveFor_D(P, i, N, x); frm.D.value = Math.round(D * 100) / 100; } else if(isNaN(N) && !( isNaN(D) || isNaN(i) || isNaN(P) || isNaN(x) )) N = this.solveFor_N(P, D, i, x); else if(isNaN(x) && !( isNaN(D) || isNaN(i) || isNaN(N) || isNaN(P) )) { x = this.solveFor_x(P, D, i, N); frm.x.value = Math.round(x * 100) / 100; } else { alert('Please supply all fields execept the one you want to determin.'); return; } if(frm.showAll.value == 'true') { var win = window.open(null, null, 'height=200,width=400'); win.document.writeln(''); win.document.writeln(''); win.document.writeln(''); win.document.writeln(''); win.document.writeln(''); win.document.writeln('

Principal:	$' + String(Math.round(P * 100) / 100) + '	Annual Intrest Rate:	' + String(i * f * 100) + '%
Down Payment:	$' + String(Math.round(D * 100) / 100) + '	Periodic Intrest Rate:	' + String(Math.round(i * 1000000) / 10000) + '%
Payment Amount:	$' + String(Math.round(x * 100) / 100) + '	Number of Payments:	' + String(N) + '
Total Repaid:	$' + String(Math.round((Math.round(x * 100) / 100) * N * 100) / 100) + '	Total Intrest:	$' + String(Math.round(((Math.round(x * 100) / 100) * N - P) * 100 ) / 100) + '

'); win.document.close(); } } } } function AmortSolve(frm) { var P = parseFloat( String(frm.P.value).replace(/[^\.0-9]/ig, '') ); var D = parseFloat( String(frm.D.value).replace(/[^\.0-9]/ig, '') ); var x = parseFloat( String(frm.x.value).replace(/[^\.0-9]/ig, '') ); var I = parseFloat( String(frm.I.value).replace(/[^\.0-9]/ig, '') ); var f = parseFloat( String(frm.f.value).replace(/[^\.0-9]/ig, '') ); var Y = parseFloat( String(frm.Y.value).replace(/[^\.0-9]/ig, '') ); if(isNaN(I) || isNaN (f) || isNaN(Y)) { alert('Annual Intrest Rate, Payments/Year, and Years of Loan cannot be solved for.'); return; } else if ( isNaN(P) && (isNaN(D) || isNaN(x)) || isNaN(D) && (isNaN(P) || isNaN(x)) || isNaN(x) && (isNaN(P) || isNaN(D)) ) { alert('Only one field can be solved for at a time.'); return; } var N = Y * f; var i = (I / 100) / f; com.ivivos.AmortizationCalculator.solve(frm, P, D, i, N, x, f); }