var active_item;
var active_grouplink;

function toggle(item,grouplink) {

	//hide currently active item (if one is present)
	if(active_item && active_item != item) {
		document.getElementById(active_item).style.display = 'none';
		document.getElementById(active_grouplink).className='tuoteryhma';
	}
	//set current item as active
	active_item = item;
	active_grouplink = grouplink;

	//toggle specified item
	if (document.getElementById(item).style.display == 'none') {
		document.getElementById(item).style.display = 'block';
		document.getElementById(grouplink).className='tuoteryhma_a';
	} else {
		document.getElementById(item).style.display = 'none';
		document.getElementById(grouplink).className='tuoteryhma';
	}

}