GlideDialog box

Hi All

I have a glide dialog box for which i wrote   a ui action and a ui page . What i see is when a user enters something in Description field and without saving the form , clicks on button which will render glide dialog box, then it gives a message as "chnages you have entered will not be saved". How can i make the desc get saved even when the user is not saving but directly clicking on ui action button.

There is some description which also gets added to the descrption field which is based on the data that got created based on UI action. How to concatenate the 1st desc which was entered by user and the second one in case of glide dialog?