Mouse up code to enter current time HH:MM in multiple fields with same parent name

I have a time field that enters the current time when I enter the field (acroform).

I was able to do this successfully with the code below.  However, I would like to copy this field multiple times (T1.0, T1.1, etc..) and not have to enter and change the javascript in each field.  Any wildcard to replace "T1.0" with the reference to the same field? I'm sure this is a very elementary question but I haven't been able to figure this out or find it.

var f = this.getField("T1.0") //target field to copy over

if (f.value != null && f.value != "")

{

} else {

   f.value = util.printd("HH:MM", new Date());

}