Bank Islam Home Loan Calculator

let calculationSteps = “”; const currencySymbol = “MYR”, fixedCurrency = “MYR”; function calculateHomeLoan(){ calculationSteps = “”; const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const loanTerm = parseInt(document.getElementById(“loanTerm”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100; if(isNaN(loanAmount) || isNaN(loanTerm) || isNaN(interestRate) || loanAmount <= 0 || loanTerm <= 0 || interestRate <= 0){ alert("Please enter valid positive values for all fields."); return; } const monthlyInterestRate = interestRate / 12; const numberOfPayments = loanTerm * 12; const monthlyPayment = loanAmount * monthlyInterestRate / (1 – Math.pow(1 + monthlyInterestRate, -numberOfPayments)); document.getElementById("monthlyPayment").value = formatCurrency(monthlyPayment); calculationSteps += `Inputs:
Loan Amount: ${formatCurrency(loanAmount)}
Loan Term: ${loanTerm} years
Interest Rate: ${(interestRate * 100).toFixed(2)}%

`; calculationSteps += `Formula:
Monthly Payment = Loan Amount × Monthly Interest Rate / (1 – (1 + Monthly Interest Rate)^{-Number of Payments})

`; calculationSteps += `Result:
Monthly Payment: ${formatCurrency(monthlyPayment)}
`; if(document.getElementById(“calculationSteps”).style.display === “block”){ document.getElementById(“calculationSteps”).innerHTML = calculationSteps; } } function resetHomeLoan(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); calculationSteps = “”; document.getElementById(“calculationSteps”).innerHTML = “

Not calculated yet.

“; } function toggleCalculationSteps(){ const s = document.getElementById(“calculationSteps”); const a = document.getElementById(“toggleArrow”); if(s.style.display === “none” || s.style.display === “”){ s.style.display = “block”; a.style.transform = “rotate(180deg)”; s.innerHTML = calculationSteps || “

Not calculated yet.

“; } else { s.style.display = “none”; a.style.transform = “rotate(0deg)”; } } function formatCurrency(n){ return currencySymbol + n.toFixed(2) + ” ” + fixedCurrency; }