function showz(what)
{
	for(k=1;k<=7;k++)
	{
		obj3 = eval("firm_id_"+k);
		obj4 = eval("zak_id_"+k);
		obj3.style.display="none";
		obj4.bgColor="#e9e1ca";
	}

	obj1 = eval("firm_id_"+what);
	obj2 = eval("zak_id_"+what);
	obj1.style.display="block";
	obj2.bgColor="#fff8e1";
}