function switch_tbody(id)
{
	obj = document.getElementById(id);

	obj.style.display = (obj.style.display=='') ? 'none' : '';
}

function switch_prod_level1(id)
{
	tb_block = document.getElementById('level1_'+id);
	arraw_img = document.getElementById('arrow_'+id);

	if(tb_block.style.display=='')
	{
		tb_block.style.display='none';
		arraw_img.src='/images/icon/arrow_yellow.gif';
	}
	else
	{
		tb_block.style.display='';
		arraw_img.src='/images/icon/arrow_yellow-01.gif';
	}
}

function switch_prod_level2(id)
{
	tb_block = document.getElementById('level2_'+id);
	arraw_img = document.getElementById('arrow_'+id);

	if(typeof(tb_block) != 'undefined')
	{
		if(tb_block.style.display=='')
		{
			tb_block.style.display='none';
			arraw_img.src='/images/icon/arrow_black-right.gif';
		}
		else
		{
			tb_block.style.display='';
			arraw_img.src='/images/icon/arrow_black-down.gif';
		}
	}
}