Is it possible to check if the mouse pointer is on the certain class?

Is it function in jQuery? Pseudo code:

$('.smth').bind('mouseout', function(){
    if(开发者_运维知识库$('.certain_class').magic_function()) {
      $('.fading_object_class').fadeOut("fast");
    }
});

If mouse pointer is not on the class certain_class, it would fade.

P.S. It's for my tooltip plugin.

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Here's some pseudo-code. But the main point here is that you can use hasClass if the element that the mouse pointer left has a certain class:

$('.smth').bind('mouseout', function(){
    if($(this).hasClass('certain_class')) {
      $('.fading_object_class').fadeOut("fast");
    }
});

Or if something else has a certain class:

$('.smth').bind('mouseout', function(){
    if($('#something_else').hasClass('certain_class')) {
      $('.fading_object_class').fadeOut("fast");
    }
});