How to fade in a div on page load?

jQuery/fadeIn

$(function() {
    $("#monster").fadeIn();
});

It cannot be simpler:

$(function(){  // $(document).ready shorthand
  $('#monster').fadeIn('slow');
});

If your div is not initially hidden, you could hide it before the animation:

 $('#monster').hide().fadeIn('slow');

The speed parameter can be 'slow', 'normal', 'fast' or the number of milliseconds to run the animation.

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