function makestrle(num,le)
{
var inx = 1;
for (var j = 0; j < le; j++)
inx *= 10;
return (Math.round(num*inx))/inx;
}
function checkNumber(input, min, max, msg)
{
msg = msg + " Please enter a valid input: " + input.value;
var str = input.value;
for (var i = 0; i < str.length; i++) {
var ch = str.substring(i, i + 1)
if ((ch < "0" || "9" < ch) && ch != '.') {
alert(msg);
return false;
}
}
var num = parseFloat(str)
if (num < min || max < num) {
alert(msg + " not in range [" + min + ".." + max + "]");
return false;
}
input.value = str;
return true;
}
function computeField(input)
{
if (input.value != null && input.value.length != 0)
input.value = "" + eval(input.value);
computeForm1(input.form);
}
function computeForm(form)
{
computeForm1(form);
DoIt ( form.years.value , form.interest.value , form.principal.value , form.payment.value );
}
function computeForm1(form)
{
if (!checkNumber(form.years, 1, 99, "# of years") ||
!checkNumber(form.interest, 0.0001, 60, "Interest") ||
!checkNumber(form.principal, 100, 10000000, "Principal")) {
form.payment.value = "Invalid";
return;
}
var i = form.interest.value / 100.0;
i /= 12;
var paymentss = form.years.value * 12;
var pow = 1;
for (var j = 0; j < paymentss; j++)
pow = pow * (1 + i);
form.payment.value = (form.principal.value * pow * i) / (pow - 1);
var payround = makestrle(form.payment.value,2);
form.payment.value = payround;
}
function clearForm(form)
{
form.years.value = "";
form.interest.value = "";
form.principal.value = "";
}
function DoIt (years,interest,principal,payment)
{
var yearses = new Array ();
yearses [9] = 0.0;
var intereses = new Array ();
intereses[9] = 0.0;
for(var i=0;i<9;i++){
intereses [i] = (interest-1)+(i*0.25);
yearses [i] = (years-4)+i;
}
var paymentes = new Array ();
paymentes [80] = 0.0;
for(var y=0;y<9;y++){
var paymentss = yearses[y] * 12;
var f = 0;
for(var d=0;d<9;d++){
var m = intereses[d] / 100.0;
m /= 12;
var pow = 1;
for (var j = 0; j < paymentss; j++)
pow = pow * (1 + m);
f = d + (9*y);
paymentes[f] = (principal * pow * m) / (pow - 1);
var payround = makestrle(paymentes[f],2);
paymentes[f] = payround;
}
}
var r = (interest/100)/12;
pow = 1+r;
for (var j = 0; j < 11; j++){
pow = pow * (1 + r);
}
var r1 = (pow-1)*100;
r1 = makestrle(r1,3);
var payround = makestrle(payment,2);
document.writeln ( "");
document.writeln ( "");
document.writeln ( "תוצאות החישוב" );
document.writeln (' ');
document.writeln ('');
document.writeln("" );
document.writeln("
");
document.writeln("
");
document.writeln(' ריבית
שנים | ');
for(var i=0;i<9;i++){
if (i==4)
document.writeln(''+ intereses[i] + "% | ")
else
document.writeln('' + intereses[i] + "% | ");
}
document.writeln("
" );
for(var y=0;y<9;y++){
document.writeln("" );
document.writeln('| ' + yearses[y] + " | ");
for(var i=0;i<9;i++){
f = i + (y*9);
if ((i==4)&& (y==4))
document.writeln(''+ paymentes[f] + ' | ')
else
if ((i==4)|| (y==4))
document.writeln(''+ paymentes[f] + " | ")
else document.writeln('' + paymentes[f] + " | ");
}
document.writeln("
" );
}
//end for
document.writeln("
" );
document.writeln('');
document.writeln ('');
document.writeln("
");
document.writeln("
");
document.writeln ('
');
document.writeln ('');
document.writeln ('');
document.writeln("");
document.close();
}