Array Data Taken From External Files

I am working on JS navigation for my web page. Contents of 3 subpages
are located in the array as shown below. When certain key is pressed on
the page, div is filled with data taken from one of the array rows.

***
var content=new Array()
content[1]='<p>some text</p>'
content[2]='<p>some other text</p>'
content[3]='<p>yet another text</p>'
***

The question is: is it possible in some simple way to put the data from
those 3 rows into 3 separate files and make the JS code to take the data
from those files? (I want to have 3 files with plain HTML) If so, please
show me some example how to do that. Or give me some address where I can
read about it, please. I have been using Google for several hours -
unfortunately without any luck.

In general - here is what I would like to do:

***
var content=new Array()
content[1]=[contents of &#391;.html' file]
content[2]=[contents of &#392;.html' file]
content[3]=[contents of &#393;.html' file]
***

How can I put the above into JS code?