scrollFollow jquery 1.6 Fixed

/**
 * jquery.scrollFollow.js
 * Copyright (c) 2008 Net Perspective (http://kitchen.net-perspective.com/)
 * Licensed under the MIT License (http://www.opensource.org/licenses/mit-license.php)
 *
 * @author R.A. Ray
 * @revision Stephan de Souza
 *
 * @projectDescription  jQuery plugin for allowing an element to animate down as the user scrolls the page.
 *
 * @version 0.4.0 ( with jQuery 1.6 Fix )
 *
 * @requires jquery.js (tested with 1.6.1)
 * @requires ui.core.js (tested with 1.8.13)
 *
 * @optional jquery.cookie.js (http://www.stilbuero.de/2006/09/17/cookie-plugin-for-jquery/)
 * @optional jquery.easing.js (http://gsgd.co.uk/sandbox/jquery/easing/ - tested with 1.3)
 *
 * @param speed     int - Duration of animation (in milliseconds)
 *                              default: 500
 * @param offset            int - Number of pixels box should remain from top of viewport
 *                              default: 0
 * @param easing        string - Any one of the easing options from the easing plugin - Requires jQuery Easing Plugin < http://gsgd.co.uk/sandbox/jquery/easing/ >
 *                              default: 'linear'
 * @param container string - ID of the containing div
 *                              default: box's immediate parent
 * @param killSwitch    string - ID of the On/Off toggle element
 *                              default: 'killSwitch'
 * @param onText        string - killSwitch text to be displayed if sliding is enabled
 *                              default: 'Turn Slide Off'
 * @param offText       string - killSwitch text to be displayed if sliding is disabled
 *                              default: 'Turn Slide On'
 * @param relativeTo    string - Scroll animation can be relative to either the 'top' or 'bottom' of the viewport
 *                              default: 'top'
 * @param delay         int - Time between the end of the scroll and the beginning of the animation in milliseconds
 *                              default: 0
 */

( function( $ ) {

    $.scrollFollow = function ( box, options )
    {
        // Convert box into a jQuery object
        box = $( box );

        // 'box' is the object to be animated
        var position = box.css( 'position' );

        function ani()
        {
            // The script runs on every scroll which really means many times during a scroll.
            // We don't want multiple slides to queue up.
            box.queue( [ ] );

            // A bunch of values we need to determine where to animate to
            var viewportHeight = parseInt( $( window ).height() );
            var pageScroll =  parseInt( $( document ).scrollTop() );
            var parentTop =  parseInt( box.cont.offset().top );
            var parentHeight = parseInt( box.cont.outerHeight() );
            var boxHeight = parseInt( box.outerHeight() + ( parseInt( box.css( 'margin-top' ) ) || 0 ) + ( parseInt( box.css( 'margin-bottom' ) ) || 0 ) );
            var aniTop;

            // Make sure the user wants the animation to happen
            if ( isActive )
            {
                // If the box should animate relative to the top of the window
                if ( options.relativeTo == 'top' )
                {
                    // Don't animate until the top of the window is close enough to the top of the box
                    if ( box.initialOffsetTop >= ( pageScroll + options.offset ) )
                    {
                        aniTop = box.initialTop;
                    }
                    else
                    {
                        aniTop = Math.min( ( Math.max( ( -parentTop ), ( pageScroll - box.initialOffsetTop + box.initialTop ) ) + options.offset ), ( parentHeight - boxHeight - box.paddingAdjustment ) );
                    }

                }
                // If the box should animate relative to the bottom of the window
                else if ( options.relativeTo == 'bottom' )
                {
                    // Don't animate until the bottom of the window is close enough to the bottom of the box
                    if ( ( box.initialOffsetTop + boxHeight ) >= ( pageScroll + options.offset + viewportHeight ) )
                    {
                        aniTop = box.initialTop;
                    }
                    else
                    {
                        aniTop = Math.min( ( pageScroll + viewportHeight - boxHeight - options.offset ), ( parentHeight - boxHeight ) );
                    }
                }

                // Checks to see if the relevant scroll was the last one
                // "-20" is to account for inaccuracy in the timeout
                if ( ( new Date().getTime() - box.lastScroll ) >= ( options.delay - 20 ) )
                {
                    box.animate(
                    {
                        top: aniTop
                    }, options.speed, options.easing
                    );
                }
            }
        };


        // For user-initiated stopping of the slide
        var isActive = true;

        if ( $.cookie != undefined )
        {
            if( $.cookie( 'scrollFollowSetting' + box.attr( 'id' ) ) == 'false' )
            {
                var isActive = false;

                $( '#' + options.killSwitch ).text( options.offText )
                .toggle(
                    function ()
                    {
                        isActive = true;

                        $( this ).text( options.onText );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), true, {
                            expires: 365,
                            path: '/'
                        } );

                        ani();
                    },
                    function ()
                    {
                        isActive = false;

                        $( this ).text( options.offText );

                        box.animate(
                        {
                            top: box.initialTop
                        }, options.speed, options.easing
                        );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), false, {
                            expires: 365,
                            path: '/'
                        } );
                    }
                    );
            }
            else
            {
                $( '#' + options.killSwitch ).text( options.onText )
                .toggle(
                    function ()
                    {
                        isActive = false;

                        $( this ).text( options.offText );

                        box.animate(
                        {
                            top: box.initialTop
                        }, 0
                        );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), false, {
                            expires: 365,
                            path: '/'
                        } );
                    },
                    function ()
                    {
                        isActive = true;

                        $( this ).text( options.onText );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), true, {
                            expires: 365,
                            path: '/'
                        } );

                        ani();
                    }
                    );
            }
        }

        // If no parent ID was specified, and the immediate parent does not have an ID
        // options.container will be undefined. So we need to figure out the parent element.
        box.cont = options.container ? box.parent() : $( '#' + options.container );

        // Finds the default positioning of the box.
        box.initialOffsetTop =  parseInt( box.offset().top );
        box.initialTop = parseInt( box.css( 'top' ) ) || 0;

        // Hack to fix different treatment of boxes positioned 'absolute' and 'relative'
        if ( box.css( 'position' ) == 'relative' )
        {
            box.paddingAdjustment = parseInt( box.cont.css( 'padding-top' ) ) + parseInt( box.cont.css( 'padding-bottom' ) );
        }
        else
        {
            box.paddingAdjustment = 0;
        }

        // Animate the box when the page is scrolled
        $( window ).scroll( function ()
        {
            // Sets up the delay of the animation
            $.fn.scrollFollow.interval = setTimeout( function(){
                ani();
            } , options.delay );

            // To check against right before setting the animation
            box.lastScroll = new Date().getTime();
        }
        );

        // Animate the box when the page is resized
        $( window ).resize( function ()
        {
            // Sets up the delay of the animation
            $.fn.scrollFollow.interval = setTimeout( function(){
                ani();
            } , options.delay );

            // To check against right before setting the animation
            box.lastScroll = new Date().getTime();
        }
        );

        // Run an initial animation on page load
        box.lastScroll = 0;

        ani();
    };

    $.fn.scrollFollow = function ( options )
    {
        options = options || {};
        options.relativeTo = options.relativeTo || 'top';
        options.speed = options.speed || 500;
        options.offset = options.offset || 0;
        options.easing = options.easing || 'swing';
        options.container = options.container || this.parent().attr( 'id' );
        options.killSwitch = options.killSwitch || 'killSwitch';
        options.onText = options.onText || 'Turn Slide Off';
        options.offText = options.offText || 'Turn Slide On';
        options.delay = options.delay || 0;

        this.each( function()
        {
            new $.scrollFollow( this, options );
        }
        );

        return this;
    };
})( jQuery );