concating Arrays in JavaScript

I have the following two arrays in JavaScript:

var array1=[[6, 12, 18],[7, 13, 19],[6, 12, 18],[7, 13, 19],[6, 12, 18],[6, 12, 18]];
var array2=[0,1,2,3,4,5];

How to concat the above arrays such that each element of array2 gets inserted at the end of each array1.
The result should be such that

var merge array=[[0, 6, 12, 18],[1, 7, 13, 19],[2, 6, 12, 18],[3, 7, 13, 19],[4, 6, 12, 18],[5,