Much easier than writing your own code is to grab someone else's. Though still a relatively new framework, more and more third-party jQuery Mobile plugins are available - usually for free - to enhance the user experience on your sites. The Google Maps plugin, for example, makes it easy to add maps to your pages, while the Datebox plugin offers as easy way to add a date picker. You can find more examples on the jQuery Mobile website.
In the next exercise, you will download and implement the ActionSheet plugin, an easy way to add a nice modal dialog: