function min_price(type)
{
	if(ajax)
	{
		ajax.open('get', 'min_price.php?type=' + encodeURIComponent(type));
		ajax.onreadystatechange = handle_min;
		ajax.send(null);
	}
	else
	{
		alert('failure in min_price()');
	}
}

function max_price(type)
{
	if(ajax2)
	{
		ajax2.open('get', 'max_price.php?type=' + encodeURIComponent(type));
		ajax2.onreadystatechange = handle_max;
		ajax2.send(null);
	}
	else
	{
		alert('failure in max_price()');
	}
}

function handle_min()
{
	if((ajax.readyState == 4) && (ajax.status == 200))
	{		
		document.getElementById('min_label').innerHTML = ajax.responseText;
	}
}

function handle_max()
{
	if((ajax2.readyState == 4) && (ajax2.status == 200))
	{
		document.getElementById('max_label').innerHTML = ajax2.responseText;
	}
}