function ExchangeLogin() {

        vstrServer='<%=LocationUrl %>'

        vstrDomain = '<%=userLogin.AD %>'

        vstrUsername = document.getElementById("<%=UserNameTxt.ClientID%>").value;

        vstrPassword = document.getElementById("<%=PassWordTxt.ClientID%>").value;

        if (vstrUsername == "" || vstrPassword == "")

        { alert("用户名密码不能为空!"); return; }

        var strUrl = "https://" + vstrServer + "/owa/auth/owaauth.dll";

        var strExchange = { destination: 'https://' + vstrServer + '/owa',

            flags: '0', forcedownlevel: '0',

            trusted: '0', isutf8: '1', username: vstrUsername, password: vstrPassword

        };

        var myForm = document.createElement("form");

        myForm.method = "post";

        myForm.action = strUrl;

        for (var varElement in strExchange) {

            var myInput = document.createElement("input");

            myInput.setAttribute("name", varElement);

            myInput.setAttribute("value", strExchange[varElement]);

            myForm.appendChild(myInput);

        }

        document.body.appendChild(myForm);

        myForm.submit();

        document.body.removeChild(myForm);

    }