In this example, our element is a <div> with an image background. Normally you would use a background image which would accomplish the same thing, but there are some instances when it needs to be a <div>, like if you had a slideshow using jQuery cycle.
This text block is the important part of the image. We need to be able to see it. If our screen is too small, then we should be able to scroll to it. It is 1000px wide and 700px tall. Go ahead and try to resize the screen; you will always be able to either see or scroll to every part of this text block no matter how big or small your browser window is.