Khoa học - Công nghệ

"; var footstr = ""; var newstr = document.all.item(text).innerHTML; //var newstr = document.getElementById(text).innerHTML; var oldstr = document.body.innerHTML; document.body.innerHTML = headstr + newstr + footstr; window.print(); document.body.innerHTML = oldstr; return false; } function printDiv2(text) { var content = document.getElementById(text).innerHTML; var printWindow = window.open('', '', 'height=600,width=800'); printWindow.document.write(''); printWindow.document.write(''); printWindow.document.write(content); printWindow.document.write(''); printWindow.document.close(); printWindow.print(); } function share_fb(url) { window.open('https://www.facebook.com/sharer/sharer.php?u='+url,'facebook-share-dialog',"width=626, height=436") } function toggleBackgroundColor() { const element = document.getElementById('contrast'); const currentColor = window.getComputedStyle(element).backgroundColor; if (currentColor === 'rgb(220, 220, 220)') { element.style.backgroundColor = '#fff'; } else { element.style.backgroundColor = 'rgb(220, 220, 220)'; } } var liActive = Array.from(document.querySelectorAll('.posts-list-noibat .post-title')); if (Array.isArray(liActive) && liActive.length ) { liActive[0].classList.add('active'); } function increaseFontSize() { var textElement = document.getElementById('text'); var currentSize = window.getComputedStyle(textElement, null).getPropertyValue('font-size'); var newSize = parseFloat(currentSize) + 2; if (newSize <= 40) { textElement.style.fontSize = newSize + 'px'; } } function decreaseFontSize() { var textElement = document.getElementById('text'); var currentSize = window.getComputedStyle(textElement, null).getPropertyValue('font-size'); var newSize = parseFloat(currentSize) - 2; if (newSize >= 12) { textElement.style.fontSize = newSize + 'px'; } } function resetFontSize() { var textElement = document.getElementById('text'); textElement.style.fontSize = '18px'; }