1. Two-dimensional array declaration is as follows: Var images = new Array (); // declare one dimension first For (var I = 0; I< 10; I++) { // one-dimensional length is 10 images[I]=new Array(); // is declaring 2 for(var j=0; J< 20; J++) { // 2d length is 20 images[I][j]=1; }}

2. The second-level array should look like this: alert(images[0][0]);