jquery.ui.effect-drop.js
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jquery.ui.effect-drop.js
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	/*!
	* jQuery UI Effects Drop 1.9.2
	* http://jqueryui.com
	*
	* Copyright 2012 jQuery Foundation and other contributors
	* Released under the MIT license.
	* http://jquery.org/license
	*
	* http://api.jqueryui.com/drop-effect/
	*
	* Depends:
	* jquery.ui.effect.js
	*/
	(function( $, undefined ) {

	$.effects.effect.drop = function( o, done ) {

	var el = $( this ),
	props = [ "position", "top", "bottom", "left", "right", "opacity", "height", "width" ],
	mode = $.effects.setMode( el, o.mode \|\| "hide" ),
	show = mode === "show",
	direction = o.direction \|\| "left",
	ref = ( direction === "up" \|\| direction === "down" ) ? "top" : "left",
	motion = ( direction === "up" \|\| direction === "left" ) ? "pos" : "neg",
	animation = {
	opacity: show ? 1 : 0
	},
	distance;

	// Adjust
	$.effects.save( el, props );
	el.show();
	$.effects.createWrapper( el );

	distance = o.distance \|\| el[ ref === "top" ? "outerHeight": "outerWidth" ]( true ) / 2;

	if ( show ) {
	el
	.css( "opacity", 0 )
	.css( ref, motion === "pos" ? -distance : distance );
	}

	// Animation
	animation[ ref ] = ( show ?
	( motion === "pos" ? "+=" : "-=" ) :
	( motion === "pos" ? "-=" : "+=" ) ) +
	distance;

	// Animate
	el.animate( animation, {
	queue: false,
	duration: o.duration,
	easing: o.easing,
	complete: function() {
	if ( mode === "hide" ) {
	el.hide();
	}
	$.effects.restore( el, props );
	$.effects.removeWrapper( el );
	done();
	}
	});
	};

	})(jQuery);