Check out the developer console in Chrome and you'll see the following message:
[blocked] The page at https://dl.dropbox.com/u/32241044/Blue%20Wolf%20Coding/page.html ran insecure content from http://maps.googleapis.com/maps/api/js?key=AIzaSyDoXopD-LqdzB0iH92fs09t_YDjyo9rX_4&sensor=true.
This means that Dropbox prevented the Google Maps API from loading. When you're running the page locally, you're accessing it with an HTTP URL, but Dropbox has SSL on it. Change your include of the Google Maps API to include the HTTPS version:
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=API_KEY&sensor=true"></script>