make sure to check out 'how to reference an element'

				we can modify an elements css style at run time too, once we have a reference to is
			

			
				all of the possible css styles on a html element are available via a property of the reference
				we get from 'querySelector'. so if our element is 'myElementInJS' then all of its styles are in
				'myElementInJS.style'. each css value has its own property in style, like 'myElementInJS.style.backgroundColor'
				notice that instead of dashes, the names of the css properties use capital letters to denote word
				breaks.
			

			
				you can set those css values to any valid thing you could set them to in a stylesheet. remember to
				wrap the value in quotes to let the browser know that they aren't javascript.