var navArrowSlider=function(a,h,b,e,f){var g=new Fx.Tween($(a),{duration:800,transition:Fx.Transitions.Elastic.easeOut});$$(h).each(function(i){i.addEvent("mouseenter",function(){var j=i.getPosition(a).x+((i.getSize().x-15)/2);g.cancel();g.start("background-position",j+"px "+e+"px")})});var d=function(){g.cancel();var i=$(b).getPosition(a).x+(($(b).getSize().x-15)/2);g.start("background-position",i+"px "+e+"px")};var c=$(b).getPosition(a).x+(($(b).getSize().x-15)/2);$(a).setStyle("background-position",c+"px "+e+"px");d();$(a).addEvent("mouseleave",d)};window.addEvent("domready",function(){navArrowSlider("nav_wrap","#nav_wrap ul li","active_nav","0","20")});