function jsTabchange(jv_active, jv_maxtab)
	{
		// inactivate one tab and activate another
		jsTabchange2('a', jv_active, jv_maxtab, '', 'hilite');
	}

	function jsTabchange2(jv_stem, jv_active, jv_maxtab, jv_offclass, jv_onclass)
	{
		// inactivate one tab and activate another
		var i=2;
		for (i=2;i<=jv_maxtab;i++)
		{
		returnObjById(jv_stem+i).className = jv_offclass;
		}
		returnObjById(jv_active).className = jv_onclass;
	}