MOSS2007 Post 登录js方法

//js  post 方法
//作者：lmm
//日期：2010.03.02
//备注：通用ajax认证
function doSignOn(strUrl, rId, rPwd) {
    var blnResult = false;
    try {
        var xmlHttpReq;
        try {
            if (window.XMLHttpRequest) {
                xmlHttpReq = new XMLHttpRequest(); //firefox下执行此语句
            }
            else if (window.ActiveXObject) {
                try {
                    xmlHttpReq = new ActiveXObject("Msxm12.XMLHTTP");
                }
                catch (e) {
                    try {
                        xmlHttpReq = new ActiveXObject("Microsoft.XMLHTTP");
                    } catch (e) { }
                }
            }
        } catch (e) { }
        xmlHttpReq.open("get", strUrl, false, rId, rPwd);
        xmlHttpReq.send(null);
        if (xmlHttpReq.readyState == 4 && xmlHttpReq.status == 200) {
            blnResult = true;
            window.location.href = strUrl;
        }

    }
    catch (err) { }
    return blnResult;
}