function openCloseNode(el)
{
	el.parentNode.className = el.parentNode.className == 'open' ? 'close' : 'open';
}

function change(el, increment)
{
	var elItemCount = document.getElementById('itemCount-'+el );
	var itemCount;
	if ( elItemCount.value < 999 && increment > 0 || elItemCount.value > 1 && increment < 0 )
	{
		// item count
		itemCount					= parseInt(elItemCount.value) + parseInt(increment);
		elItemCount.value	= itemCount;
	}
}