JS获取当天是周几

                                    dt2 = new Date();
                                    var weekDay = ["星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];
                                    if( weekDay[dt2.getDay()] == '星期一' )
                                    {
                                        str += line[i].SENDTIMEMONDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期二' )
                                    {
                                        str += line[i].SENDTIMETUESDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期三' )
                                    {
                                        str += line[i].SENDTIMEWEDNESDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期四' )
                                    {
                                       str += line[i].SENDTIMETHURSDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期五' )
                                    {
                                        str += line[i].SENDTIMEFRIDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期六' )
                                    {
                                         str += line[i].SENDTIMESATURDAY;
                                    }
                                    if( weekDay[dt2.getDay()] == '星期天' )
                                    {
                                        str += line[i].SENDTIMESUNDAY;
                                    }