Rezisable text inside in non-fixed image

I want to put a text on an image that will automaticly resize when the image resize because my image is not fixed. I am using this jQuery code to resize my image:

$("#ht").animate({width:random*5-25, length:random*5-25}, 1500); $("#ht").animate({width:random*5+25, length:random*5+25}, 1500);

PG random is a random number from 20 to 99.

PG 2 I want the image to display itself and random