// ======================================================================

//

//	On document ready functions

//

// ======================================================================



jQuery(document).ready(function() {

	

	

	// 3D ribbon scroll triggers

	// -------------------------------------------------------------------

	// trigger when scrolling occurs

	$j(window).scroll(function () {

		ribbonPosition();

	});

	// run once on load

	ribbonPosition();	



	

});



// Ribbon scrolling effects 

// -------------------------------------------------------------------



function ribbonPosition() {

	var $ = jQuery;

	

	var	t = $(window).scrollTop();

	var	h = $(window).height();

	

	// offset - increase or decrease size of middle (set to zero to disable)

	var	offset = $(window).height() / 25;	

	

	var	zoneSize = $(window).height() / 3;

	var	zoneOne = t + zoneSize + offset;

	var	zoneTwo = t + zoneSize * 2 - offset;

		

	$(".ribbon .wrapAround").each( function() {

		var obj = $(this);

		var objH = obj.height();

		var offset = obj.offset();

		if (offset.top + objH <= zoneOne) {

			$(this).css('background-position','0 0');

		} else if (offset.top >= zoneTwo) {

			$(this).css('background-position','0 -104px');

		} else {

			$(this).css('background-position','0 -52px');

		}

	});	

}