Date at sign up

ok im having a problem for some reason the enter birthdate isnt working for joining up all other details can be entered but you cant enter your birthdate click on it nothing happens , am i doing something wrong or havent turned something on or what looked everywhere just cant get it to work , plz help , i have Dolphin 7.1

http://www.boonex.com/forums/?action=goto&search=1

See this topic

http://www.boonex.com/forums/topic/Datepicker-Fix-for-Firefox-19-and-Chrome.htm

Thank you so much