Jayson
This downloadable script is focused on organizing your data in a mosaic dataset for management and access, either from ArcGIS Desktop (ArcMap or ArcGIS Pro), or ArcGIS Image Server, if you have large collections/large # of users.
The user interface for accessing those images is a separate topic. If you'll be building a web client for image access, I'd encourage you use Web AppBuilder developer edition, and note that you'll want to add the image service widgets, and specifically the Image Selector widget.
Links:
Web AppBuilder for ArcGIS (Developer Edition) | ArcGIS for Developers
Image service widgets: http://esriurl.com/WABIS
For an example, although not exactly a "browse" implementation, see the Landsat Explorer app here Landsat Explorer
In this case, the image selector is using the DATE field. It's labeled the "time" selector here, but the widget is general purpose - you can use any field in the attribute table to select images
When the widget opens, note you can use the time slider view where there's a tic mark for every available image
or you can switch to a pulldown list to see dates