<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> .div{ color:yellow; padding:30px; font-size:80px } </style> </head> <body> <div id='div'> </div> </body> </html><script src='itcast.js'></script> <script> var div = document.getElementById ( 'div') // not when frame // // div.style.background = 'Red' // div.name = 'myDiv' // div.className = 'div' // div.innerHTML = 'Welcome to the World of Warcraft' var div = $$. $ The above mentioned id ( ' div ' ) $$. CSS ( ' div ' , ' background ' , ' Red ' ) $$. attr ( ' div ' , ' name ' , ' myDiv ' ) $$. attr ( ' div ' ,'className' , ' Div ' ) $$. HTML ( ' div ' , ' Welcome to the World of Warcraft ' ) </ Script>