Is there a way to get values from the user in a Photoshop script?

I'm using a JSX script to export an image to different sizes in Photoshop and I would like to get a value from the user. If possible I would like to show a dialog with a form but I would be able to work with being able to get a text value as well.

Link to script: http://ift.tt/1y2dtrj

Link to similar post: http://ift.tt/14eZWCG