var XmlHttp = null;

function GetXmlHttpObj() {
    var XmlHttpObj = null;
    try {
        if (window.ActiveXObject) {
            for (var i = 5; i; i--) {
                try {
                    if (i == 2) {
                        XmlHttpObj = new ActiveXObject("Microsoft.XMLHTTP");
                    }
                    else {
                        XmlHttpObj = new ActiveXObject("Msxml2.XMLHTTP." + i + ".0");
                    }
                    XmlHttpObj.setRequestHeader("Content-Type", "text/xml");
                    XmlHttpObj.setRequestHeader("Content-Type", "utf-8");
                    break;
                }
                catch (e)
				{ }
            }
        }
        else if (window.XMLHttpRequest) {
            XmlHttpObj = new XMLHttpRequest();
            if (XmlHttpObj.overrideMimeType) {
                XmlHttpObj.overrideMimeType('text/xml');
            }
        }
    }
    catch (e)
	{ }
    return XmlHttpObj;
}


function XmlHttpGetMethod(uri) {
    XmlHttp = GetXmlHttpObj();
    if (XmlHttp == null) {
        alert('很抱歉，你的浏览器版本不支持，操作终止');
        return;
    }
    XmlHttp.open("GET", uri, false);
    XmlHttp.send(null);
}


function XmlHttpPostMethod(uri, parmsStr) {
    XmlHttp = GetXmlHttpObj();
    if (XmlHttp == null) {
        alert('很抱歉，你的浏览器版本不支持，操作终止');
        return;
    }
    XmlHttp.open("POST", uri, false);
    XmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    XmlHttp.send(parmsStr);
}



function XmlHttpGetMethodText(uri) {
    XmlHttpGetMethod(uri);
    return XmlHttp.responseText;
}

function XmlHttpPostMethodText(uri, parmsStr) {
    XmlHttpPostMethod(uri, parmsStr);
    return XmlHttp.responseText;
}
/*20100428 增加异步调用*/
function XmlHttpPostMethodAsync(uri, parmsStr, pid) {
 
    var xmlHttp = GetXmlHttpObj();
    if (xmlHttp == null) {
        alert('很抱歉，你的浏览器版本不支持，操作终止');
        return;
    }
 
    xmlHttp.open("POST", uri, true);
    xmlHttp.onreadystatechange = function() {
        //如果执行是状态正常，那么就把返回的内容赋值给上面指定的层
        if (xmlHttp.readyState == 4 && xmlHttp.status == 200) {
            //  alert(xmlHttp.responseText);
        
            document.getElementById(pid).innerHTML = xmlHttp.responseText;
        }
    }
 
    //XmlHttp.onreadystatechange = myhandleResponse;
    xmlHttp.setRequestHeader("CaChe-Control", "no-CaChe");
    xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xmlHttp.send(parmsStr);

 
}
 


/*结束*/

function XmlHttpGetMethodXml(uri) {
    XmlHttpGetMethod(uri);
    return XmlHttp.responseXML;
}

function XmlHttpPostMethodXml(uri, parmsStr) {
    XmlHttpPostMethod(uri, parmsStr);
    return XmlHttp.responseXML;
}