code: function(obj, o, v, prev) {
  			var id = v === TRUE ? QTIP.nextid : v,
  				newId = NAMESPACE + '-' + id;
  
  			if(id !== FALSE && id.length > 0 && !$('#'+newId).length) {
  				this._id = newId;
  
  				if(this.rendered) {
  					this.tooltip[0].id = this._id;
  					this.elements.content[0].id = this._id + '-content';
  					this.elements.title[0].id = this._id + '-title';
  				}
  			}
  			else { obj[o] = prev; }
  		}
docs: Core checks