$('.cellcontent').animate({
   left: '-=190'}, {
   easing: alert('start ani'),
   duration: 5000,
   complete: alert('end ani')});

complete:  function() { alert('end ani'); }

alert('start ani');
$('.cellcontent').animate({
     left: '-=190'
   },
   {
     easing: 'swing',
     duration: 5000,
     complete: function(){
        alert('end ani');
    }
});

$('.cellcontent').animate({
    left: '-=190'}, {
    easing: alert('start ani'),
    duration: 5000,
    complete: function() { alert('end ani') }
});

$('.cellcontent').animate({
    left: '-=190'}, {
    easing: alert('start ani')
}, duration).promise().done(function () {
     alert('end animation');
});

var onComplete = function () {
    alert('end ani');
};

$('.cellcontent').animate({
    left: '-=190'}, {
    easing:  'slow',
    duration: 5000,
    complete: onComplete //<-- function is passed as a variable, not called directly
 });

$('.cellcontent').animate({
  left: '-=190'}, {
  easing:  'slow',
  duration: 5000,
  complete:  function () {
        alert('end ani');
  }
});

$( "#clickme" ).click(function() {
  $( "#book" ).animate({
    opacity: 0.25,
   left: "+=50",
    height: "toggle"
  }, 5000, function() {
    // Animation complete.
  });
});

$('.cellcontent').animate({
  left: '-=190',
  easing:  'slow',
  duration: 5000,
  function () {
    alert('end ani');
  }
});