Setting font size for multiple text fields with button

Hi. I have been on Adobe LiveCycle for awhile but I still have problems in optimizing scripts as I do not have any programming background.

I have multiple textfields and I would like to decrease its font size all together with a click of a button.

I went through the Adobe Community and found a helpful post and I took the script from it. However, as per the script below, I believe it can be optimized maybe using arrays. However, I have no idea how to go about it.

Can anyone help? Your suggestions / advice will be highly appreciated.

var currentSize = Signature.RepName.font.size;
var currentSize = Signature.RepPosition.font.size;
var currentSize = Signature.RepCompany.font.size;

var ptPlace = currentSize.indexOf ( "pt");
var currentSizeInt = currentSize.substr ( 0, ptPlace);
var newSizeInt = parseInt (currentSizeInt, 10) - 1;

// set that as the new font size ( adding the "pt" back on)

Signature.RepName.font.size = newSizeInt + "pt";
Signature.RepPosition.font.size = newSizeInt + "pt";
Signature.RepCompany.font.size = newSizeInt + "pt";