jquery out of bounds

gistfile1.js

// Out of bounds 
// Checks wether the element has been hidden by the user scrolling its parent
// Returns an object with, if above
//   above : true
//   crop : 92
// If below 
//   below : true
//   crop 182
// Where crop is the no of pixels is it cropped by
// Object will be empty if its not out of bounds  


(function($) {

	$.fn.hiddenByScroll = function( $wrapper ) {

		var $el = $(this);
		var $elOffset = $el.offset();
		var $wrapperOffset = $wrapper.offset();
		var result = {};

		// Bottom Positions
		$elOffset.bottom = $elOffset.top + $el.height();
		$wrapperOffset.bottom = $wrapperOffset.top + $wrapper.height();

		if ( $elOffset.top < $wrapperOffset.top ) {

			result.above = true;
			result.crop = $wrapperOffset.top - $elOffset.top

		} else if ( $elOffset.bottom > $wrapperOffset.bottom ) {

			result.below = false;
			result.crop = $elOffset.bottom - $wrapperOffset.bottom;

		} 

		return result;

	};

}($) );

Thank you!
This code is very useful for me.
But this code has one mistake, need result.below = false change to result.below = true )