<!DOCTYPE html> <html> <head> <script> function display() { var col=document.getElementById("demo"); col.style.color="#FF0000"; } </script> </head> <body> <h1>My First JavaScript</h1> <p id="demo">click on the button below.....</p> <button onclick="display()">Display</button> </body> </html>
var span = document.getElementsByTagName("span")[0]; span.style.color = "red";