searching content of multi line Text Field

Hello

i have a large multi line Text Field that contain multiple visits with a certain Date configurations

something like this (Sunday 06/01/2019):

I was able to collect them through RegEx and put them in a popUpMenu through this code:

function ShowVisits() {

var keyword = /[(](\w{6,9})\s(\d{1,2})[/](\d{1,2})[/](\d{4})[)][:]/g

var str = this.getField("HistoryT").value;

var match = str.match(keyword);

var begining = ["Visits"];

var aGhazali = match.unshift(begining)

var cRtn = app.popUpMenu(match)

}

What I would like to do now is to modify the function to search in the content of the Text Field  and do something like setting focus or scroll down to where the match is.

I have tried to search using the built in Find but it only finds the match if it is available in the screen, but if its need to be scrolled to find will show no matching is found

thanks