Searching a text string seperated by commas

1

I’m trying to find if a text field with text seperated by commas contains certain text.

if (myText.text == “three”) {
trace(“true”); //if myTxt.text is “three”
} else {
trace(“false”); //if myTxt.text is “one, two, three”
}

Is there a way to find in the above example, if “three” is contained within the text field?

Thanks in advance.