function ch(idx,ImagePath)
{
	document.getElementById('img_category-a').src = (idx == 'a') ? ImagePath + "/front/sub/sub_category_title01on.gif" : ImagePath + "/front/sub/sub_category_title01.gif";
	document.getElementById('img_category-b').src = (idx == 'b') ? ImagePath + "/front/sub/sub_category_title02on.gif" : ImagePath + "/front/sub/sub_category_title02.gif";

	document.getElementById('category-a').style.display = (idx == 'a') ? "" : "none";
	document.getElementById('category-b').style.display = (idx == 'b') ? "" : "none";
}