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<!DOCTYPE html> <html> <body> <head> <meta name="description" content="Free Web tutorials"> <meta name="keywords" content="HTML5,CSS,JavaScript"> <meta name="author" content="John Doe"> </head> <p>Click the button to return the value of the content attribute of all meta elements.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementsByTagName("META"); var txt = ""; var i; for (i = 0; i < x.length; i++) { txt = txt + "Content of "+(i+1)+". meta tag: "+x[i].content+"<br>"; } document.getElementById("demo").innerHTML = txt; } </script> </body> </html>