document.addEventListener('DOMContentLoaded', function() { var loanAmountInput = document.getElementById('loan-amount'); if (loanAmountInput) { loanAmountInput.addEventListener('input', function() { var value = this.value.replace(/,/g, ''); // Remove existing commas if (!isNaN(value) && value.length > 0) { var formattedValue = Number(value).toLocaleString('en'); this.value = formattedValue; } }); loanAmountInput.addEventListener('blur', function() { var value = this.value.replace(/,/g, ''); // Remove existing commas on blur if (!isNaN(value) && value.length > 0) { this.value = Number(value).toLocaleString('en'); } }); } });