Draggable Text Box

How do you make a text box draggable?
I have a text box in a span with a border of 2 px and used the
UI.Draggable widget to make it draggable. I can click and drag on the
span border and the text box will move as expected. I can't get this
to work if I click inside of the text box. The textbox just wants to
set focus in the input field and it gives you a blinking cursor.