function on_massage() {
	var item = document.getElementById('img_massage');
	item.src='images/item_select_massage.jpg';
}

function on_info() {
	var item = document.getElementById('img_info');
	item.src='images/item_select_info.jpg';
}

function on_training() {
	var item = document.getElementById('img_training');
	item.src='images/item_select_training.jpg';
}