Javascript and tipped arrays [duplicate]

Question

I am developing a web page with JavaScript and HTML. I am use jQuery and I must highlight a selected dates. I have that array:

var events = [ 
{ Title: "Five K for charity", Date: new Date("02/13/2013"), dir: "http://www.google.es" }, 
{ Title: "Dinner", Date: new Date("02/25/2013") }, 
{ Title: "Meeting with manager", Date: new Date("03/01/2013") }
];

My question is, how I can add an element in that array? I tried a lot of things and I dont know how. And another question, what is the name of that kind of array?

EDIT:

I see one thing. If a add a date like "01/05/2013", the array is like that:

Wed Feb 13 2013 00:00:00 GMT+0100 (Hora de verano romance)
Mon Feb 25 2013 00:00:00 GMT+0100 (Hora de verano romance)    
Fri Mar 01 2013 00:00:00 GMT+0100 (Hora de verano romance)
Sat Jan 05 2013 00:00:00 GMT+0100 (Hora de verano romance) 

And prints the date in the datepicker. But if I add a date like "05/05/2013" then:

Wed Feb 13 2013 00:00:00 GMT+0100 (Hora de verano romance)
Mon Feb 25 2013 00:00:00 GMT+0100 (Hora de verano romance)
Fri Mar 01 2013 00:00:00 GMT+0100 (Hora de verano romance)
Sun May 05 2013 00:00:00 GMT+0200 

You will see? The new date its diffent of the other. And in this case, the date are not highlited in the datepicker. Anyone knows why?

Answer 1

There is no a true name for that array, it's just an Array of Objects. To append a new Object you have to do this:

events.push({Title: '...', ...}); //define the object to be appended

To define a new Date object you should use this constructor:

var d = new Date(year, month, day, hours, minutes, seconds, milliseconds);
//in this case it will be(month goes from 0 to 11)
new Date(2013, 4, 5); //this will be the 5th of May(which is 4)

There are a lot of methods for the Date Object, you just have to choose which one is the best for your purposes!

Reference to the Date Object - MDN