Need To Store Bgcolor In External JS File

I need to create an external .JS in perl script, with a Var that holds the bgcolor of a table. I need it to be an external .JS file because i will be changeing the color values alot.

I dont want to generate the HTML, at this time, with perl.
Createing the .JS file is easy, what i need to know is:

1. What the .JS file needs to look like.
2. And how to assign the table bgcolor to the var stored in the .JS file.
:)
The .JS file will need several Vars

var color1 = "#000000";
var color2 = "#000000";
var color3 = "#000000";

The table need to look something like this:

<table width="100%" border="1" cellspacing="10" cellpadding="5" bgcolor="COLOR1" bordercolor="COLOR2">
<tr>
<td bgcolor="COLOR3">

</td>
</tr>
</table>