/************************************
公用的AJAX框架模块
************************************/
var XMLHttpReq = false;//设一个变量

//创建一个XMLHttpRequest对象
function createXMLHttpRequest()
{
    if (window.XMLHttpRequest)//Mozilla 
    {
         XMLHttpReq = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
        try{
            XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
        } catch(e) {
            try{
                XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
            } catch(e) {
            }
        }
    }
}

/**
发送请求函数

url:访问的链接. queryString:参数串 onreadystatechange:处理返回信息的回调函数

*/

function send(url, queryString, onreadystatechange)
{
    createXMLHttpRequest();
    XMLHttpReq.open("POST", url, true);
    XMLHttpReq.onreadystatechange = onreadystatechange;//指定响应的函数

	XMLHttpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");
	XMLHttpReq.send(queryString);//发送请求

}

document.write("<div style='display:none'>");
document.write("<iframe width=0 height=0 style='display:none;' id='hideiframe'></iframe>");
document.write("</div>");
function sendToLog(url, queryString)
{
	var ifr = document.getElementById("hideiframe");
	if(ifr == undefined || ifr == null) {
		send(url, queryString, function (){});
	} else {
		ifr.src = url + "?" + queryString;
	}
}