javascript - No idea why I get: Uncaught TypeError: Cannot read property '0' of undefined -

so want check spot in two-dimensional array, have no idea why chrome returns:

"uncaught typeerror: cannot read property '0' of undefined".

in function put() check if fieldspaces[column][row] equal empty

this js-code:

var empty = 0;  var fieldspaces = new array(7); (var column = 0; column < 7; column++)     fieldspaces[column] = new array(6);  (var column = 0; column < 7; column++)     (var row = 0; row < 6; row++)         fieldspaces[column][row] = empty;  function checkempty(c){     var top = 5;     var column = c;     var isempty = false;     if(fieldspaces[column][0] == empty){         console.log("it empty");     } }