/*
             * stickyfloat - jQuery plugin for verticaly floating anything in a constrained area
             * 
             * Example: jQuery('#menu').stickyfloat({duration: 400});
             * parameters:
             *      duration    - the duration of the animation
             *      startOffset - the amount of scroll offset after it the animations kicks in
             *      offsetY     - the offset from the top when the object is animated
             *      lockBottom  - 'true' by default, set to false if you don't want your floating box to stop at parent's bottom
             * $Version: 05.16.2009 r1
             * Copyright (c) 2009 Yair Even-Or
             * vsync.design@gmail.com
             * 
             * Changes by jelle@gerbrandy.com	
             */

            $.fn.stickyfloat = function(options, lockBottom) {
                var $obj                = this;
                var parentPaddingTop    = parseInt($obj.parent().css('padding-top'));
                var startOffset         = $obj.parent().offset().top;
                var opts                = $.extend({ startOffset: startOffset, offsetY: parentPaddingTop, duration: 200, lockBottom:true }, options);
                
                $obj.css({ position: 'absolute' });
                
                if(opts.lockBottom){
                    var bottomPos = $obj.parent().height() - $obj.height() + parentPaddingTop; //get the maximum scrollTop value
                    if( bottomPos < 0 )
                        bottomPos = 0;
                }
                
                $(window).scroll(function () { 
                    $obj.stop(); // stop all calculations on scroll event

                    var pastStartOffset         = $(document).scrollTop() > startOffset;   // check if the window was scrolled down more than the start offset declared.
                    var objFartherThanTopPos    = $obj.offset().top > startOffset;  // check if the object is at it's top position (starting point)
                    var objSmallerThanWindow     = $obj.outerHeight() < $(window).height();  // if the window size is smaller than the Obj size, then do not animate.
                    // if window scrolled down more than startOffset OR obj position is greater than
                    // the top position possible (+ offsetY) 
//                    console.info('pastStartOffset: ' + pastStartOffset)
//                    console.info('objFartherThanTopPos: ' + objFartherThanTopPos)
//                    console.info('$obj.offset().top: ' + $obj.offset().top)
//                    console.info('startOffset: ' + startOffset)
//                    console.info('bottomPos: ' + bottomPos)
                    if( (pastStartOffset || objFartherThanTopPos)){ 
                        var newpos = ($(document).scrollTop() - startOffset + opts.offsetY );
                        var newpos = ($(document).scrollTop()) // - startOffset + opts.offsetY );
                        	
                        if ( newpos > bottomPos )
                            newpos = bottomPos;
                        if (newpos < startOffset) { newpos = startOffset }
                        if ( $(document).scrollTop() < startOffset ) // if window scrolled < starting offset, then reset Obj position (opts.offsetY);
                            newpos = startOffset;
                        if (objSmallerThanWindow) {
	                        $obj.animate({ top: newpos }, opts.duration );
//                        		console.info('1')
                        } else { //the object is bigger than the window: if we scroll further down, we want to stick  to the bottom
                        	//if we go up, we want to stick to the top
                        	if ($(document).scrollTop() < $obj.offset().top ) { 
//                        		console.info('2: ' + newpos)
		                        $obj.animate({ top: newpos }, opts.duration );
                        	} else if ( $(document).scrollTop() + $(window).height() > $obj.outerHeight() + $obj.offset().top )  {
                        		// move the object so its bottom sticks to the bottom
//                        		console.info('3')
		                        $obj.animate({ top : newpos + $(window).height() - $obj.outerHeight() }, opts.duration );
                        	}
                        }
                    }  
                });
            };