gistfile1.txt

function SomeBuggyInstantiatedObject() {
  this.name = "bob";
  someElement.onclick = function() {
    alert(this.name); // undefined, because this context is the click event
  }
}

function SomeSuperCoolInstantiatedObject() {
  var that = this;
  this.name = "bob";
  someElement.onclick = function() {
    alert(that.name); // bob, because that is sealed in scope when the function was declared
  }
}