How to make the output textfield also show the font attribute the same as the input

Hello,

I have two textfield, one for input and another for output. Now when I choose the color and the font face from the combo box, the input text field is changed at the same time, but after click submit button, the output textfield only changes the texts which the user inputdoesn't change the fonts. So Could some one give advice how should I modify? Many Many thanks indeed!!