$j(function()
{
	if (typeof prices == 'object')
	{
		$j('#quantity').change(function()
		{
			$j('div.product_box table.price_ranges tr').removeClass('current').filter('.qty_'+get_price_qty($j(this).val())).addClass('current');
//			$j('div.product_box div.product_price').text(get_price_qty($j(this).val()));
		});
	}
});

function get_price(qty)
{
	// expects global object prices to operate correctly.
	// prices format as following: {'qty1' : price1, 'qty2' : price 2}
	var k = 0;
	var v = 0;
	qty = qty*1; // "40"<"7"
	$j.each(prices, function(key, val)
	{
		key=key*1;
		if (key<=qty && key>=k)
		{
			v = val;
			k = key;
		}
	});
	if (v == 0)
	{
		v = 'POA';
	}
	return v;
}

function get_price_qty(qty)
{
	// expects global object prices to operate correctly.
	// prices format as following: {'qty1' : price1, 'qty2' : price 2}
	var k = 0;
	var v = 0;
	qty = qty*1; // "40"<"7"
	$j.each(prices, function(key, val)
	{
		key=key*1;
		if (key<=qty && key>=k)
		{
			v = val;
			k = key;
		}
	});
	return k;
}