if($.trim($("#user_api_register_form").find("input[name=‘user_name‘]").val())!=$.trim($("#user_api_register_form").find("input[name=‘user_name‘]").val()).match(/^[a-z0-9A-Z\u4e00-\u9fa5]+$/gi))
    {
        $.showErr("用户名只允许为纯英文，数字和汉字及其组合",function(){            
            $("#user_api_register_form").find("input[name=‘user_name‘]").focus();
            
        });
        return false;
    }