Variable istgleich funktionsvorschrift und definition durch doppelpunkt

selectGroup = 
		{
			groups:new Array(), //[groupname]=item
			getGroup:function(group) 
			{
				if(typeof(this.groups[group]) == "undefined")   
				{
					this.groups[group] = new Object();
					this.groups[group].activeItem = "undefined";  
					this.groups[group].onActivate = function(obj) {};
					this.groups[group].onDeactivate = function(obj) {};
				}
				return this.groups[group];
			},
			activate:function(obj, group) {
			g = this.getGroup(group);
			if(typeof(g.activeItem) != "undefined") {  
			g.onDeactivate(g.activeItem);
			}
			g.activeItem=obj;
			g.onActivate(obj);
			}
		};