javasript 判断时间范围

var myDate = new Date();

var nowHours = myDate.getHours();

var nowWeek = myDate.getDay();

if(nowHours>=18 || week>5 || nowHours<=8 || week ==0){

                 alert("在周一到周五18:00-8：00时间范围")

}else{

                  alert（“不在范围”）

}

var nowday = "日一二三四五六";

var str="今天星期"+charAt(new Date().getDay());