function calculateMortgage(){ const loanAmount = parseFloat(document.getElementById(“loanAmount”).value); const interestRate = parseFloat(document.getElementById(“interestRate”).value) / 100 / 12; const loanTerm = parseInt(document.getElementById(“loanTerm”).value) * 12; const biweeklyPayment = parseFloat(document.getElementById(“biweeklyPayment”).value); if(isNaN(loanAmount) || isNaN(interestRate) || isNaN(loanTerm) || isNaN(biweeklyPayment)){ alert(“Please enter valid values for all fields.”); return; } const monthlyPayment = (loanAmount * interestRate) / (1 – Math.pow(1 + interestRate, -loanTerm)); const totalPayment = monthlyPayment + (biweeklyPayment * 2); // Extra biweekly payments const newLoanTerm = Math.ceil((Math.log(totalPayment / (totalPayment – loanAmount * interestRate)) / Math.log(1 + interestRate)) * 12); const payoffDate = new Date(); payoffDate.setMonth(payoffDate.getMonth() + newLoanTerm / 12); document.getElementById(“monthlyPayment”).value = monthlyPayment.toFixed(2); document.getElementById(“payoffDate”).value = payoffDate.toDateString(); } function resetMortgage(){ document.querySelectorAll(“#calculator input”).forEach(el => el.value = “”); }