titleCase.jsee

// Words to exclude
var excludeWords = ['a', 'an', 'and', 'for', 'or', 'as', 'at', 'of'];

/*
Choose between:
eeCaseLowerCase
eeCaseUpperCase
eeCaseCapitalize
*/
var convertTo = eeCaseCapitalize;

function coords() {
	return {
		x: document.selection.GetActivePointX(eePosLogical),
		y: document.selection.GetActivePointY(eePosLogical),
	};
}
function includes(arr, find) {
	for (var i = 0; i < arr.length; i++) {
		if (arr[i] === find) {
			return true;
		}
	}
	return false;
}
var matchNonwhitespace = new RegExp('\\S');

var left = {
	x: document.selection.GetTopPointX(eePosLogical),
	y: document.selection.GetTopPointY(eePosLogical),
};
var selected = {
	x: document.selection.GetBottomPointX(eePosLogical),
	y: document.selection.GetBottomPointY(eePosLogical),
};

if (left.x > 1) {
	document.selection.SetActivePoint(eePosLogical, left.x, left.y);
	document.selection.SetActivePoint(eePosLogical, left.x - 1, left.y, true);
	if (document.selection.Text !== ' ') {
		document.selection.WordRight();
		left = coords();
	}
}

while (left.y < selected.y || left.x < selected.x) {
	document.selection.SetActivePoint(eePosLogical, left.x, left.y);
	document.selection.WordRight(true);
	var right = coords();

	if (includes(['’', '\''], document.selection.Text)) { // Skip apostrophe
		document.selection.WordRight(true);
		right = coords();
	} else if (matchNonwhitespace.test(document.selection.Text)) {
		if (document.selection.Text.slice(-1) === ' ') {
			right = coords();
			document.selection.SetActivePoint(eePosLogical, left.x, left.y);
			document.selection.SetActivePoint(eePosLogical, right.x - 1, right.y, true);
		}
		
		if (!includes(excludeWords, document.selection.Text)) {
			document.selection.ChangeCase( convertTo );
		}
	}

	left = right;
}

document.selection.CharRight();

That worked very well. That you very much for this.