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<!DOCTYPE html> <html> <body> <h1>A H1 element</h1> <h2>A H2 element</h2> <div>A DIV element</div> <p>A p element.</p> <p>A p element with a <span style="color:brown;">span</span> element inside.</p> <p>Click the button to set the background color of all h2, div and span elements.</p> <button onclick="myFunction()">Try it</button> <p><strong>Note:</strong> The querySelectorAll() method is not supported in Internet Explorer 8 and earlier versions.</p> <script> function myFunction() { var x = document.querySelectorAll("h2, div, span"); var i; for (i = 0; i < x.length; i++) { x[i].style.backgroundColor = "red"; } } </script> </body> </html>