var array_chunk = function(array, size) {

	var output = [],
      i = 0,
	    n = 0;

	for(item in array) {

		if(i >= size) {
			i = 0;
			n++;
		}

		if(!output[n] || output[n] == 'undefined') {
			output[n] = [];
		}

		output[n][i] = array[item];

		i++;

	}

	return output;

};