Replacing a number value in a field with an image

I have constructed a 20X12 matrix of text fields as a graph, displaying the actual value as a plot point.
For example, (More than 200 of these IF statements)

if (Q1 >= 1 && Q1 <=5) {
this.getField ("txtSubtest1_Cell10").value = pscore1;
}

I'd like to replace the actual value with a .jpg (a small icon instead).

Is this possible?

Thanks for your help.

Rich