//**Ajax ¿ªÊ¼
var http = getHTTPObject();
function getHTTPObject()
{
	var xmlhttp = false;
	if(window.XMLHttpRequest)
	{
		xmlhttp = new XMLHttpRequest();
		if(xmlhttp.overrideMimeType)
		{
			xmlhttp.overrideMimeType('text/xml');
		}
	}
	else
	{
		try
		{
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e)
		{
			try
			{
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(E)
			{
				xmlhttp = false;
			}
		}
	}
	return xmlhttp;
}