Add restriction to text box InDesign

TextRestrictionInDesign

var textRestrict:spark.components.TextInput;
textRestrict.restrict = "0-9,"  //Numbers and comma only
/*********************************************************
textRestrict.maxChars = 5;
textRestrict.restrict = "a-zA-Z0-9"; //Alpha-numeric only
textRestrict.restrict = "0-9"; //Numbers only
textRestrict.restrict = "^a-z"; //All chars, only uppercase alpha
textRestrict.restrict = "\u0020-\u007E"; //ASCII chars 32 (space) through 126 (tilde) only
textRestrict.restrict = "^\^\-"; //All chars but not the caret or hyphen
*********************************************************/

textRestrict.addEventListener(TextOperationEvent.CHANGE,onTextChanged);
public function onTextChanged(e:TextOperationEvent):void
{
	var inputTxt:spark.components.TextInput = e.target as spark.components.TextInput;
	var reg:RegExp = /[^,]*,[^,]*,/g;
	if(inputTxt.text.search(reg) != -1)
		inputTxt.text = inputTxt.text.substr(0,inputTxt.text.length-1);
	}