Василий Наумкин

<script type="text/javascript">
	$(document).ready(function() {
		// save default value
		miniShop2.Order.add('comment', 'No Sales Agent');
		miniShop2.Order.initialize('#msOrder');

	});

	var mydropdown = document.getElementById('salesAgent');

	mydropdown.onchange = function(){
	     miniShop2.Order.add('comment', this.value);
	}	
</script>

<script type="text/javascript">
	$(document).ready(function() {
		miniShop2.Order.initialize('#msOrder');
	});

	var mydropdown = document.getElementById('salesAgent');

	mydropdown.onchange = function(){
	     miniShop2.Order.add('comment', this.value);
	}	
</script>

'syncsite' => true

miniShop2.Order.add('comment', 'you text here');