Javascript examples for DOM:Document getElementsByClassName
Document getElementsByClassName() Method - Find out how many elements with class="example" there are in the document
<!DOCTYPE html> <html> <body> <div class="example"> A div element with class="example" </div>/* w w w .j a va 2s. c om*/ <div class="example"> Another div element with class="example" </div> <p class="example">A p element with class="example"</p> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementsByClassName("example"); document.getElementById("demo").innerHTML = x.length; } </script> </body> </html>