openedCat=0;
function displayCat(id)
{
	if (document.getElementById("row-cat-"+id).style.display=='table-row')
	{
		document.getElementById("row-cat-"+id).style.display = 'none';
		openedCat = 0;
	}
	else if (openedCat!=id)
	{
		if (openedCat!=0) document.getElementById("row-cat-"+openedCat).style.display = 'none';
		document.getElementById("row-cat-"+id).style.display = 'table-row';
		openedCat = id;
	}
}