function strt(tname)
{
	cnt=tname;
	test=cnt;
}
function table_change(tab_name)
{
	t_prev=document.getElementById("table_"+cnt);
	t_now=document.getElementById("table_"+tab_name);
	prev=document.getElementById(cnt);
	now=document.getElementById(tab_name);
	t_prev.style.display="none";	
	if(test=="cf_cn")
	{prev.className="bg_sub_section_inactive";
	now.className="bg_sub_section_active";
	}
	else
	{prev.className="bg_sub_section_active";
	now.className="bg_sub_section_inactive";
	}
	t_now.style.display="block";
	cnt=tab_name;	
}