jquery datepicker - choosing a date past 50 year

jquery datepicker - choosing a date past 50 year

I'm trying to pick a date past 50 year through jQuery datepicker but the
select type of year shows only limited number of years. I've to repeatedly
select year to go back to past years.
Here's jQuery script I'm using:
$(".datepicker").datepicker({
changeMonth: true,
changeYear: true,
minDate: "-50Y",
maxDate: "-6Y"
});
I'd created a fiddle http://jsfiddle.net/5xQb3/
Please check. I want to show all year in one time not selecting them
repeatedly.
Also, I would like to display the date as yyyy-mm-dd format.