Почему массив делает не то что я ему говорю?

[Nace]

Здравствуйте, у меня возникла проблема с массивом, вот код:

function addGrid(){
	for(j = 1; j <= 10; j ++){
		for(i = 1; i <= 10; i ++){
			nameCell = "cell" + j + "_" + i;
			cellX = (i - 1) * 50;
			cellY = (j - 1) * 50;
			grid[[j],[i]] = attachMovie("cell", nameCell, depth ++);
			grid[[j],[i]]._x = cellX;
			grid[[j],[i]]._y = cellY;			
			cellType[[j],[i]] = 1;
			trace(grid[[5],[6]]);
		}
	}
}

А вот то, что он трейсит:

undefined
undefined
undefined
undefined
undefined
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell1_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell2_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell3_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell4_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell5_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell6_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell7_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell8_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell9_6
_level0.cell10_6
_level0.cell10_6
_level0.cell10_6
_level0.cell10_6
_level0.cell10_6

помогите пожалуйста, целый день возился, в инете не нашёл и в книге нет этого(

[Hauts]

var grid = [];
function addGrid(){
	for(j = 0; j < 10; j ++){
		grid[j] = [];
		for(i = 0; i < 10; i ++){
			grid[j][i] = attachMovie("cell",  "cell" + (j+1) "_" + (i+1), depth ++);
			grid[j][i]._x = i * 50;
			grid[j][i]._y = j * 50;			
			cellType[j][i] = 1;
			trace(grid[5][6]);
		}
	}
}

Так лучше?

[udaaff]

grid[[j],[i]] - а что это за конструкция?

[EndoCrinologist]

двумерный массив.. возможно...