Datetimepicker problem starting decades

Question

I've got a problem this the datetimepicker starting in decades.

when I open the datepicker, it starts well on the 200-2019 decades. I can go left or right to change decades.
Datetimepicker problem starting decades image 1

Datetimepicker problem starting decades image 1

I press 2 times the left arrow to select the 1960 - 1079 decades.

Datetimepicker problem starting decades image 2

the code seem then like this :

Datetimepicker problem starting decades image 3

I select then the 1970 year

Datetimepicker problem starting decades image 4

the display show the monthes, but the selection stay on the years

Datetimepicker problem starting decades image 5

Datetimepicker problem starting decades image 6

the "roll over" effect on the month doesn't work and If I click over a month, example "MAI", The year 1967 is choosen and I can then re choose a month correctly.

Datetimepicker problem starting decades image 7

Datetimepicker problem starting decades image 7

Hope this is clear ! :-)

thanks

joel

ps: the problem is visible on this "on construction page"

http://lcda.labsinfo.be/index.php/devenez-copain

on the field "Date de naissance"

Check the new Joomla Extension Builder

Datetimepicker problem starting decades