How to create an empty 2d array in javascript? below is an example of what I want to create

This should work:

var a = [[], [], []];

The following code should create a new array, and then push three elements that make up a similar content of what you requested (string values instead of variables).

var a = [];
a.push([1, 'a', 'c']);
a.push([2, 'd', 'e']);
a.push([3, 'w', 'e']);

Well, if you want to create a new, completely blank, 2D Array:

var array = [[]];