countUp = function() {
	var inputList = $$('div#cartAdd input');
	var count = inputList[0].value;

	inputList[0].value = eval(count) + 1;
}

countDown = function() {
	var inputList = $$('div#cartAdd input');
	var count = inputList[0].value;

	if (count > 1) {
		inputList[0].value = eval(count) - 1;
	}
}

insertArrow = function() {
	var inputFields = $$('#cartAdd input');
	leftArrow = '<img class="arrow" src="includes/templates/template_default/buttons/japanese/arrow_l01.gif" onclick="countDown()" />';
	rightArrow = '<img class="arrow" src="includes/templates/template_default/buttons/japanese/arrow_r01.gif" onclick="countUp()" />';

	if (inputFields[0].type != 'hidden') {
		new Insertion.Before(inputFields[0], leftArrow);
		new Insertion.After(inputFields[0], rightArrow);
	}
}

Event.observe(window, 'load', insertArrow);