Please enter a valid asset cost.

'; return; } const usefulLife = asset.life; const annualDepreciation = assetCost / usefulLife; let schedule = []; let bookValue = assetCost; for (let year = 1; year <= usefulLife; year++) { bookValue -= annualDepreciation; schedule.push({ year: year, depreciation: annualDepreciation, bookValue: bookValue }); } renderSchedule(schedule); } function renderSchedule(schedule) { let tableHTML = ` `; schedule.forEach(row => { tableHTML += ` `; }); tableHTML += '

Year	Annual Depreciation	Ending Book Value
${row.year}	$${row.depreciation.toFixed(2)}	$${row.bookValue.toFixed(2)}

'; scheduleContainer.innerHTML = tableHTML; } function renderConfig() { configTbody.innerHTML = assetData.map(a => ` ${a.name} `).join(''); } window.updateConfig = function(element) { const { id } = element.dataset; const value = parseFloat(element.value); if (isNaN(value) || value <= 0) return; const asset = assetData.find(a => a.id === id); if (asset) { asset.life = value; calculateDepreciation(); } } // --- TAB & NAVIGATION --- window.openTab = function(evt, tabName) { const tabContents = document.getElementsByClassName("tab-content"); Array.from(tabContents).forEach(tab => tab.style.display = "none"); const tabButtons = document.getElementsByClassName("tab-btn"); Array.from(tabButtons).forEach(btn => btn.classList.remove("active")); document.getElementById(tabName).style.display = "block"; if (evt) { evt.currentTarget.classList.add("active"); } else { const btnToActivate = Array.from(tabButtons).find(btn => btn.getAttribute('onclick').includes(`'${tabName}'`)); if (btnToActivate) btnToActivate.classList.add("active"); } updateNavButtons(); } window.navigateTabs = function(direction) { const tabs = Array.from(document.querySelectorAll('.tab-btn')); const activeTabIndex = tabs.findIndex(tab => tab.classList.contains('active')); let newIndex = (direction === 'next') ? (activeTabIndex + 1) % tabs.length : (activeTabIndex - 1 + tabs.length) % tabs.length; tabs[newIndex].click(); } function updateNavButtons() { const tabs = Array.from(document.querySelectorAll('.tab-btn')); const activeTabIndex = tabs.findIndex(tab => tab.classList.contains('active')); document.getElementById('prev-btn').style.visibility = activeTabIndex === 0 ? 'hidden' : 'visible'; document.getElementById('next-btn').style.visibility = activeTabIndex === tabs.length - 1 ? 'hidden' : 'visible'; } // --- PDF DOWNLOAD --- if(downloadPdfBtn) { downloadPdfBtn.addEventListener('click', function() { const { jsPDF } = window.jspdf; const contentToDownload = document.getElementById('results-to-download'); if (!contentToDownload || !document.getElementById('schedule-table')) { console.warn("Please generate a schedule before downloading."); return; } const originalButtonText = downloadPdfBtn.innerHTML; downloadPdfBtn.innerHTML = 'Generating...'; downloadPdfBtn.disabled = true; html2canvas(contentToDownload, { scale: 2, useCORS: true }).then(canvas => { const imgData = canvas.toDataURL('image/png'); const pdf = new jsPDF({ orientation: 'p', unit: 'mm', format: 'a4' }); const pdfWidth = pdf.internal.pageSize.getWidth(); const imgProps = pdf.getImageProperties(imgData); const imgHeight = (imgProps.height * pdfWidth) / imgProps.width; pdf.addImage(imgData, 'PNG', 10, 10, pdfWidth - 20, imgHeight > 0 ? imgHeight - 20 : 0); pdf.save('Depreciation-Schedule.pdf'); }).catch(err => { console.error("Error generating PDF:", err); }).finally(() => { downloadPdfBtn.innerHTML = originalButtonText; downloadPdfBtn.disabled = false; }); }); } // --- INITIALIZATION --- function initializeTool() { populateControls(); calculateDepreciation(); renderConfig(); updateNavButtons(); } initializeTool(); });