按YYYYMMDD格式計(jì)算給定出生日期的年齡給定YYYYMMDD格式的出生日期，我如何計(jì)算年齡？是否可以使用Date()功能？我正在尋找一個(gè)比我現(xiàn)在使用的更好的解決方案：var dob = '19800810';var year = Number(dob.substr(0, 4));var month = Number(dob.substr(4, 2)) - 1;var day = Number(dob.substr(6, 2));var today = new Date();var age = today.getFullYear() - year;if (today.getMonth() < month || (today.getMonth() == month && today.getDate() < day)) {  age--;}alert(age);