/**
 * jquery.scrollFollow.js
 * Copyright (c) 2008 R.A. Ray (net-perspective.com)
 * Licensed under the MIT (MIT-LICENSE.txt)
 * 
 * @projectDescription	jQuery plugin for allowing an element to animate down as the user scrolls the page.
 * 
 * @version 1.0.0b
 * 
 * @requires jquery.js (tested with 1.2.2)
 * @requires ui.core.js (tested with 1.5b4)
 * @requires jquery.easing.js (http://gsgd.co.uk/sandbox/jquery/easing/ - tested with 1.3)
 * @requires jquery.cookie.js (http://www.stilbuero.de/2006/09/17/cookie-plugin-for-jquery/)
 * 
 * @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 - < http://gsgd.co.uk/sandbox/jquery/easing/ > - Use 'linear' for no easing
 * 								default: 'easeOutBack'
 * @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'
 */


(function($){$.scrollFollow=function(box,options){function ani(box,iTop){$(box).dequeue();var pageScroll=$(document).scrollTop();var parentTop=$(cont).offset().top;var parentHeight=$(cont).height();var boxTop=$(box).offset().top;var boxHeight=box.offsetHeight;var aniTop;if(isActive){aniTop=Math.min((Math.max((parentTop+iTop),(pageScroll+options.offset))-parentTop),(parentHeight-boxHeight));$(box).animate({top:aniTop},options.speed,options.easing)}};var isActive=true;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:'/'})},function(){isActive=false;$(this).text(options.offText);$(box).animate({top:initialTop},0);$.cookie('scrollFollowSetting'+$(box).attr('id'),false,{expires:365,path:'/'})})}else{$('#'+options.killSwitch).text(options.onText).toggle(function(){isActive=false;$(this).text(options.offText);$(box).animate({top:initialTop},0);$.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:'/'})})}var cont;if(options.container==''){cont=$(box).parent()}else{cont=document.getElementById(options.container)}var initialTop=$(box).css('top');if(initialTop=='auto'){initialTop=0}else{initialTop=parseInt(initialTop.substr(0,initialTop.indexOf('p')))}$(window).scroll(function(){ani(box,initialTop)})};$.fn.scrollFollow=function(options){options=options||{};options.speed=options.speed||500;options.offset=options.offset||0;options.easing=options.easing||'easeOutBack';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';this.each(function(){new $.scrollFollow(this,options)});return this}})(jQuery);