loadstatustext = '';
function ajaxLoad1(url,id)
{
	if (document.getElementById) {
		var x = (window.ActiveXObject) ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
	}
	if (x)
	{
		x.onreadystatechange = function()
		{
			el = document.getElementById(id);
			el.innerHTML = loadstatustext;
			if (x.readyState == 4 && x.status == 200)
			{
				el.innerHTML = x.responseText;
			}
		}
		x.open("GET", url, true);
		x.send(null);
	}
}

// code demo by www.phpbasic.com
function pb_display1(x)
{
ajaxLoad1('quanhuyen.php?town='+x,'huyen');
}

// code demo by www.phpbasic.com
function pb_display2(x)
{
ajaxLoad1('quanhuyen.php?town='+x,'huyen2');
}