Titanium insert after functionality

app.js

var win = Ti.UI.createWindow({
	backgroundColor: '#39f',
	layout: 'vertical'
});

var wrapper = Ti.UI.createView({
	layout: 'vertical'
});

var label1 = Ti.UI.createLabel({
	text: 'Label 1'
});

label1.toString = function() {
	return this.text;
};

var label2 = Ti.UI.createLabel({
	text: 'Label 2'
});

label2.toString = function() {
	return this.text;
};

var label3 = Ti.UI.createLabel({
	text: 'Label 3'
});

label3.toString = function() {
	return this.text;
};

var label4 = Ti.UI.createLabel({
	text: 'Label 4'
});

label4.toString = function() {
	return this.text;
};

wrapper.add(label1);
wrapper.add(label2);
wrapper.add(label3);
win.add(wrapper);

//Ti.API.debug(label1.parent);

function insertAfter(parent, element, after) {
	Ti.API.info('Insert after');
	Ti.API.debug(parent);
	Ti.API.debug(element);
	Ti.API.debug(after);
	Ti.API.debug(parent.children);
	Ti.API.debug(parent.children.length);
	Ti.API.info('after');
	Ti.API.debug(element);
	Ti.API.debug(after);
	var afterIndex = -1;
	var children = parent.children.slice(0);
	Ti.API.info('children');
	
	Ti.API.debug(children.join(', '));
	for (var i = 0; i < children.length; ++i) {
		if (after === children[i]) {
			afterIndex = i;
			Ti.API.info('After index: ' + afterIndex);
		}
		parent.remove(children[i]);
	}
	
	Ti.API.debug(parent.children.join(', '));
	
	if (afterIndex >= 0) {
		Ti.API.info('children splice');
		var tmp = children.slice(0, afterIndex + 1);
		Ti.API.debug(tmp.join(', '));
		tmp.push(element);
		Ti.API.debug(tmp.join(', '));
		var tmp2 = children.slice(afterIndex + 1);
		Ti.API.debug(tmp2.join(', '));
		children = tmp.concat(tmp2);
		Ti.API.debug(children.join(', '));
	}
	
	for (i = 0; i < children.length; ++i) {
		Ti.API.info('children add');
		Ti.API.debug(children[i]);
		parent.add(children[i]);
	}
}

setTimeout(function() { insertAfter(wrapper, label4, label2); }, 3000);

win.open();