easyui dialog添加和修改时中文出现乱码，求教！！！！

我用easyui datagrid显示一个表的数据，点击添加或者修改按钮时会弹出dialog的对话框，前台都能正确的拿到值，但是传到后台的时候，只要是中文的都变成了乱码。这是怎么回事？？
给你们看一下我的代码

  var toolbar = [{
            text: '添加',
            iconCls: 'icon-add',
            handler: function () {
                $("#divadd").show();
                $("#divadd").dialog({
                    title: '添加',
                    width: 300,
                    height: 300,
                    closed: false,
                    cache: false,
                    modal: true,
                    buttons:[{
                        text: '保存',
                        iconCls: 'icon-save',
                        handler: function () {
                            var loginid = $("#txtLoginId").val();
                            var LoginPwd = $("#txtLoginPwd").val();
                            var UserStateId = $("#txtUserStateId").val();
                            var TeacherName = $("#txtTeacherName").val();
                            var Sex = $('#txtSex').datebox('getValue');
                            var Birthday = $('#txtBirthday').datebox('getValue');
                            $.ajax({
                                url: "Handler.ashx?type=2&loginId=" + loginid + "&LoginPwd=" + LoginPwd + "&UserStateId=" + UserStateId + "&TeacherName=" + TeacherName + "&Sex=" + Sex + "&Birthday=" + Birthday,
                                success: function (data) {
                                    if (data == "ok") {
                                        $.messager.alert("系统提示", "数据添加成功！");
                                        showDate();
                                        $('#divadd').dialog('close');
                                        $("input").val('');
                                    }
                                    else {
                                        $.messager.alert("系统提示", "数据添加成功！");
                                        return false;
                                    }
                                }
                            })
                        }

encodeURIComponent编码下你的内容，或者将内容放到data配置里面，jquery会自动帮你编码

  url: "Handler.ashx?type=2&loginId=" +encodeURIComponent( loginid) + "&LoginPwd=" +encodeURIComponent(  LoginPwd) + "&UserStateId=" + encodeURIComponent( UserStateId) + "&TeacherName=" + encodeURIComponent( TeacherName) + "&Sex=" + encodeURIComponent( Sex) + "&Birthday=" +encodeURIComponent(  Birthday)

或者

  url: "Handler.ashx',
 data:{type:2,loginId:loginid.....................}

ajax传的参数不要写在URL后，用data传试试；给你个例子
$.ajax({
type: "post",
url: "${ctx}/serviceManage/creatDirectory",
data : {
currentNodeId : currentNodeId,
directoryName:directoryName,
tenantid:tenantid
},
success: function (data) {
}
});
后台取参数的方法相同