Scripting the DOM exercise:

(1)  Create an HTML + Javascript page.
When the page first displays, it will have an <h1> containing only the character '1', 
and a second <h1> containing only the character '2'.

There will be a button at the bottom labelled 'swap'.

When the user clicks the button, the two h1 headers will swap.  Use the DOM Object methods
described at http://www.w3schools.com/htmldom/dom_methods.asp

(2)  Write a second HTML + Javascript page.
When the page first displays, it will have three <h1> elements containing '1', '2', '3'
respectively. 
There will be a button at the bottom labelled 'advance'.
When the user clicks the button, the first <h1> element moves to the second position,
the second moves to the third, and the third moves to the first. You must use the DOM
object methods (see above URL).