function showTiers(department_id){}
function showSubTiers(tier_id,department_id)
{
	var output = '';
	for(var i in tier[tier_id])
	{
		output += "<a href=\""+tier[tier_id][i][1]+"\">"+tier[tier_id][i][0]+"</a>\n";
	}
	$("#dsubtiers_"+department_id).html(output);
}