function Something() {
 goog.events.EventHandler.call(this);

 ... set up object ...

 // Add event listeners
 this.listen(this.starEl, 'click', this.handleStar);
 this.listen(this.headerEl, 'click', this.expand);
 this.listen(this.collapseEl, 'click', this.collapse);
 this.listen(this.infoEl, 'mouseover', this.showHover);
 this.listen(this.infoEl, 'mouseout', this.hideHover);
 }
 goog.inherits(Something, goog.events.EventHandler);

 Something.prototype.disposeInternal = function() {
 Something.superClass_.disposeInternal.call(this);
 goog.dom.removeNode(this.container);
 };


 // Then elsewhere:

 var activeSomething = null;
 function openSomething() {
 activeSomething = new Something();
 }

 function closeSomething() {
 if (activeSomething) {
 activeSomething.dispose();  // Remove event listeners
 activeSomething = null;
 }
 }