function showsub_a(id)
{
	for (i = 0;i<3;i++)
	{
		document.getElementById("tab_a"+i).className = "yk_menu_index_photo_02";
		document.getElementById("sub_a"+i).style.display = "none";
	}
		document.getElementById("tab_a"+id).className = "yk_menu_index_photo_01";
		document.getElementById("sub_a"+id).style.display = "";
}
function showsub_b(id)
{
	for (i = 0;i<4;i++)
	{
		document.getElementById("tab_b"+i).className = "yk_menu_index_photo_02";
		document.getElementById("sub_b"+i).style.display = "none";
	}
		document.getElementById("tab_b"+id).className = "yk_menu_index_photo_01";
		document.getElementById("sub_b"+id).style.display = "";
}
function showsub_c(id)
{
	for (i = 0;i<4;i++)
	{
		document.getElementById("tab_c"+i).className = "yk_menu_index_photo_02";
		document.getElementById("sub_c"+i).style.display = "none";
	}
		document.getElementById("tab_c"+id).className = "yk_menu_index_photo_01";
		document.getElementById("sub_c"+id).style.display = "";
}

function showsub_d(id)
{
	for (i = 0;i<3;i++)
	{
		document.getElementById("tab_d"+i).className = "yk_menu_index_photo_2";
		document.getElementById("sub_d"+i).style.display = "none";
	}
		document.getElementById("tab_d"+id).className = "yk_menu_index_photo_1";
		document.getElementById("sub_d"+id).style.display = "";
}

function showsub_e(id)
{
	for (i = 0;i<4;i++)
	{
		document.getElementById("tab_e"+i).className = "yk_menu_index_photo_02";
		document.getElementById("sub_e"+i).style.display = "none";
	}
		document.getElementById("tab_e"+id).className = "yk_menu_index_photo_01";
		document.getElementById("sub_e"+id).style.display = "";
}