Text field height

Hi,

Do you know a way to get the textfield area height when inside text change ?

I explain, I change the text inside a textfield, but after that I need to know the height of this one (that has changing on screen)

my code (textfield is already with text)

sym.$("TextIntroduction").html("Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed nec libero auctor, consectetur elit ac, elementum libero. Praesent euismod, libero non consectetur interdum, elit dui condimentum neque,");

sym.$("TextIntroduction").height(); // but here I get the original textfield height

thanks !