[nerv_]

вариант #2

function dateDiff( date1, date2 ) {
	date1 = new Date( date1 );
	date2 = new Date( date2 );
	
	var milliseconds = date2.getMilliseconds() - date1.getMilliseconds();
	
	if ( milliseconds < 0 ) {
		milliseconds += 1000;
		date2.setSeconds( date2.getSeconds() - 1 );
	}
	
	var seconds = date2.getSeconds() - date1.getSeconds();
	
	if ( seconds < 0 ) {
		seconds += 60;
		date2.setMinutes( date2.getMinutes() - 1 );
	}
		
	var minutes = date2.getMinutes() - date1.getMinutes();
	
	if ( minutes < 0 ) {
		minutes += 60;
		date2.setHours( date2.getHours() - 1 );
	}
	
	var hours = date2.getHours() - date1.getHours();
	
	if ( hours < 0 ) {
		hours += 24;
		date2.setDate( date2.getDate() - 1 );
	}
	
	var days = date2.getDate() - date1.getDate();
	
	if ( days < 0 ) {
		days += new Date( date2.getFullYear(), date2.getMonth() - 1, 0 ).getDate() + 1;
		date2.setMonth( date2.getMonth() - 1 );
	}
	
	var months = date2.getMonth() - date1.getMonth();
	
	if ( months < 0 ) {
		months += 12;
		date2.setFullYear( date2.getFullYear() - 1 );
	}
	
	var years = date2.getFullYear() - date1.getFullYear();
	
	return [ years, months, days, hours, minutes, seconds, milliseconds ];
}

alert( dateDiff( '2013-01-10 00:10', '2013-01-11 00:09' ) );
alert( dateDiff( '2013-04-10', '2013-10-20' ) );