var elem = document.createElement('div'); elem.style.cssText = 'position:absolute;width:100%;height:100%;opacity:0.3;z-index:100;background:#000'; document.body.appendChild(elem);
// In the JS script var parElement = document.getElementById("myPar"); var textToAdd = document.createTextNode("Text to be added"); parElement.appendChild(textToAdd); //In the HTML file <p id="myPar"></p>
document.getElementById("p").textContent += " This is the text from javascript."; <p id ="p">This is the text from HTML.</p>