Где ошибка в функции?

function formatDate(date) { 
	var toString = {}.toString; 
	if (toString.call(date) === '[object Date]') { 
		var dd = date.getDate(); 
  		if (dd < 10) dd = '0' + dd; 
		 
  		var mm = date.getMonth() + 1; 
  		if (mm < 10) mm = '0' + mm; 
		 
  		var yy = date.getFullYear() % 100; 
  		if (yy < 10) yy = '0' + yy; 
		 
  		return dd + '.' + mm + '.' + yy; 
	} 
	else if (typeof date === 'string') { 
		date = date.split('-').join(); 
		return formatDate(new Date(date)); 
	} 
	else if (Array.isArray(date)) { 
		date = date.join(); 
		return formatDate(new Date(date)); 
	} 
	else { 
		date = new Date(date*1000); 
		date = date.getFullYear() + ', ' + date.getMonth() + ', ' + date.getDate(); 
		return formatDate(new Date(date)); 
	} 
} 
 
console.log( formatDate('2011-10-02') ); // 02.10.11 
console.log( formatDate(1234567890) ); // 14.02.09 
console.log( formatDate([2014, 0, 1]) ); // 01.01.14 
console.log( formatDate(new Date(2014, 0, 1)) ); // 01.01.14