$(document).ready(function() {
  
// smooth background motion

if(!document.defaultView || !document.defaultView.getComputedStyle){ // IE6-IE8
	var oldCurCSS = jQuery.curCSS;
	jQuery.curCSS = function(elem, name, force){
		if(name === 'background-position'){
			name = 'backgroundPosition';
		}
		if(name !== 'backgroundPosition' || !elem.currentStyle || elem.currentStyle[ name ]){
			return oldCurCSS.apply(this, arguments);
		}
		var style = elem.style;
		if ( !force && style && style[ name ] ){
			return style[ name ];
		}
		return oldCurCSS(elem, 'backgroundPositionX', force) +' '+ oldCurCSS(elem, 'backgroundPositionY', force);
	};
}

var oldAnim = $.fn.animate;
$.fn.animate = function(prop){
	if('background-position' in prop){
		prop.backgroundPosition = prop['background-position'];
		delete prop['background-position'];
	}
	if('backgroundPosition' in prop){
		prop.backgroundPosition = '('+ prop.backgroundPosition;
	}
	return oldAnim.apply(this, arguments);
};

function toArray(strg){
	strg = strg.replace(/left|top/g,'0px');
	strg = strg.replace(/right|bottom/g,'100%');
	strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
	var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
	return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
}

$.fx.step. backgroundPosition = function(fx) {
	if (!fx.bgPosReady) {
		var start = $.curCSS(fx.elem,'backgroundPosition');
		
		if(!start){//FF2 no inline-style fallback
			start = '0px 0px';
		}
		
		start = toArray(start);
		
		fx.start = [start[0],start[2]];
		
		var end = toArray(fx.options.curAnim.backgroundPosition);
		fx.end = [end[0],end[2]];
		
		fx.unit = [end[1],end[3]];
		fx.bgPosReady = true;
	}
	//return;
	var nowPosX = [];
	nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
	nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];           
	fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];

};

// navigation actions

  $('#primaryNavigation ol ol').addClass('sub');
  
  //navigation highlight
  $(function(){
     var path = location.pathname.substring(1);
     if ( path ) {
       $('#primaryNavigation a[href$="' + path + '"]').attr('class', 'current');
       $('#primaryNavigation a[href$="' + path + '"]').closest('li.multi').attr('class', 'current');
    }
    else {
      $('#primaryNavigation a#home').attr('class', 'current');
    }
   });
  //navigation animations
  $('#primaryNavigation ol li').mouseenter(function() {
    var openheight = $(this).children('ol.sub').children('li').length * 30 + 15;
    $(this).stop().animate({backgroundPosition: '0px -25px'}, 200);
    $(this).children('ol.sub').stop().animate({height: openheight}, 300);
  });
  $('#primaryNavigation ol li, #primaryNavigation ol ol li').mouseleave(function() {
    $(this).stop().animate({backgroundPosition: '0px 0px'}, 200);
    $(this).children('ol.sub').stop().animate({height: '0px'}, 300);
  });

});