function showData()
{
	var	req;
	var 	str = "siteupdate.php";
	if(window.XMLHttpRequest)
	{
		req= new XMLHttpRequest();
	}
	else if(window.ActiveXObject)
	{
		req= new ActiveXObject("Microsoft.XMLHTTP");
	}
	else
	{
		alert("Error");
		return false;
	}
	req.onreadystatechange=function()
	{
		if (req.readyState==3)
		{
			var dataShow = document.getElementById('data');
			dataShow.innerHTML="กำลังดึงประมวลผล";
		}
		
		if (req.readyState==4)
		{
			var dataShow = document.getElementById('data');
			dataShow.innerHTML=req.responseText;
		}
	}
	req.open("GET",str,true);
	req.send(null);
}