ExpandableNavItem=Class.create();ExpandableNavItem.prototype={initialize:function(a){this.navItem=$(a);this.children=this.navItem.getElementsByTagName("ul")[0];this.mainLink=this.navItem.getElementsByTagName("a")[0];this.widget=this.navItem.getElementsByTagName("a")[1];Event.observe(this.widget,"click",this.toggleChildren.bindAsEventListener(this));Event.observe(this.mainLink,"click",this.toggleChildren.bindAsEventListener(this))},toggleChildren:function(a){if(Element.visible(this.children)){Element.hide(this.children);this.widget.innerHTML="<span>+</span>";Element.removeClassName(this.navItem,"expanded")}else{Element.show(this.children);this.widget.innerHTML="<span>-</span>";Element.addClassName(this.navItem,"expanded")}Event.stop(a)}};