給個(gè)采納吧，小老弟

var?now?=?new?Date();?//?當(dāng)前時(shí)間
var?startDate?=?new?Date('2018-10-10');?//?開始時(shí)間
var?endDate?=?new?Date('2018-10-17');?//?結(jié)束時(shí)間

//?在區(qū)域范圍內(nèi)
if?(now.getTime()?>=?startDate.getTime()?&&?now.getTime()?<?endDate.getTime())?{
??//?展示為紅色代碼
??document.write('<p?style="color:?red">開始時(shí)間:?'?+?getTime(startDate)?+?'</p>');
??document.write('<p?style="color:?red">結(jié)束時(shí)間:?'?+?getTime(endDate)?+?'</p>');
}?else?{
??console.log('不在區(qū)域范圍內(nèi)')
}

function?getTime(date)?{
????var?year?=?date.getFullYear();
????var?month?=?date.getMonth()?+?1;
????var?day?=?date.getDate();
????return?year?+?'-'?+?month?+?'-'?+?day;
}