//author -- Simon Leung
//date -- 2008.11.10

//通过URL地址获取返回数据
//Url--接口地址
//Method--方式：Post或Get
//返回函数GetAjaxReturnData(ReturnText)
function PostAjaxData(Url, Method)
{
	var http_News = false;
	if(window.XMLHttpRequest)
	{
		http_News = new XMLHttpRequest();
		if(http_News.overrideMimeType)
		{
			http_News.overrideMimeType('text/xml');
		}
	}
	else if(window.ActiveXObject)
	{
		try
		{
			http_News = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch(e)
		{
			try
			{   
				http_News = new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(e)
			{
			}
		}
	}
	if(!http_News) return false;
	http_News.onreadystatechange = function() {
		if(http_News.readyState == 4)
		{
			if(http_News.status == 200)
				GetAjaxReturnData(http_News.responseText);
			else
				return false;
		}
		else
			return false;
	}
	http_News.open(Method, Url, true);
	http_News.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
	http_News.send(null);
	delete http_News;
	CollectGarbage();
}