$.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' }).animate({ opacity: 1 });
    
    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() > opts.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 objBiggerThanWindow 	= $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) AND window size must be bigger than Obj size
    	if( (pastStartOffset || objFartherThanTopPos) && objBiggerThanWindow ){ 
    		var newpos = ($(document).scrollTop() -startOffset + opts.offsetY );
    		if ( newpos > bottomPos )
    			newpos = bottomPos;
    		if ( $(document).scrollTop() < opts.startOffset ) { // if window scrolled < starting offset, then reset Obj position (opts.offsetY);
    			newpos = parentPaddingTop;
				}
    	}
    	$obj.animate({ top: newpos, opacity: 0.9 }, opts.duration );
    });
};