โปรแกรมคำนวณเงินผ่อนสินเชื่อ

body { font-family: ‘Noto Sans Thai’, sans-serif; background-color: #f5f5f5; padding: 40px; } .container { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; } .form-column, .result-column { width: 480px; padding: 20px; border-radius: 10px; box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); } .form-column { background-color: #ffffff; border: 1px solid #ccc; } .result-column { background-color: #ff6500; color: white; border: 1px solid #d45500; } h2 { text-align: center; font-size: 22px; } .form-group { margin-bottom: 15px; } .form-group label { display: block; font-weight: bold; margin-bottom: 5px; } .form-group input { width: 100%; padding: 8px; box-sizing: border-box; border: 1px solid #ccc; border-radius: 5px; font-size: 16px; } .button { text-align: center; } .button button { padding: 10px 20px; background-color: #ff6500; color: white; border: none; border-radius: 5px; cursor: pointer; font-size: 16px; } .button button:hover { background-color: #383838; } .result { font-size: 1.2em; white-space: pre-line; }

โปรแกรมคำนวณเงินผ่อนติดตั้งโซล่าเซลล์

function removeComma(input) { input.value = input.value.replace(/,/g, “”); } function formatComma(input) { const value = parseFloat(input.value.replace(/,/g, “”)); if (!isNaN(value)) { input.value = value.toLocaleString(‘en’); } } function calculateLoan() { const solarPriceInput = document.getElementById(‘solarPrice’); const downPayment = parseFloat(document.getElementById(‘downPayment’).value); const interestRate = parseFloat(document.getElementById(‘interestRate’).value); const loanMonths = parseFloat(document.getElementById(‘loanMonths’).value); const rawPrice = solarPriceInput.value.replace(/,/g, “”); const solarPrice = parseFloat(rawPrice); if (!solarPrice || !downPayment || !interestRate || !loanMonths) { document.getElementById(‘result’).innerText = “กรุณากรอกข้อมูลให้ครบถ้วน”; return; } const downPaymentAmount = solarPrice * (downPayment / 100); const loanAmount = solarPrice – downPaymentAmount; const monthlyInterestRate = (interestRate / 100) / 12; const monthlyPayment = (loanAmount * monthlyInterestRate) / (1 – Math.pow(1 + monthlyInterestRate, -loanMonths)); document.getElementById(‘result’).innerText = ` ราคาติดตั้งโซล่าเซลล์: ${solarPrice.toLocaleString()} บาท เงินดาวน์: ${downPaymentAmount.toLocaleString()} บาท (${downPayment}%) ยอดจัดไฟแนนซ์: ${loanAmount.toLocaleString()} บาท ค่างวดต่อเดือน: ${monthlyPayment.toFixed(2).toLocaleString()} บาท`; }