function change( id ,obj , img_id) {
	var img = "http://fastlux.jp/images/helmet-sample2/" + id + ".jpg";
//	document.getElementById('helmet-sample-A').src = img;
	document.getElementById( img_id ).src = img;

	obj.style.color = "#FF0000";

} 

function re_change( obj ) {
	obj.style.color = "#808080";
}