How to parse a date in format “YYYYmmdd” in JavaScript?

Question

This is a noob question:

How to parse a date in format \"YYYYmmdd\" without external libraries ? If the input string is not in this format I would like

Answer 1

simplistic answer maybe, without checks, but fast...

var date = parseInt(date);
new Date(date / 10000, date % 10000 / 100, date % 100);

or, if months are not zero based in the source,

new Date(date / 10000, (date % 10000 / 100) - 1, date % 100);