星期几阵列

Question

var days = ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"];
var birthDate = new Date(year, monthNumber/3, day);
var dayNumber = (birthDate.getDay());
var dayName = days.indexOf(dayNumber);
document.writeln ('I was born on a ' + dayName + '');{

为什么要赢得这项工作？它输出-1对我来说，var daynumber是正确的，显示正确的日期编号，但是如何让它对应/输出实际的日期名称？

Answer 1

这将有效：

var dayName = days[dayNumber];