[jQuery] event handler variable scope in classes

[steve]

I'm a bit of a jQuery newbie, trying to convert some existing class
files to a jQuery structure. I have a class like this:

function testClass(){
  this.foo = 100;
  this.init();
}

testClass.prototype = {
  init: function(){
    var instance = this;
    $('a', instance).click(function(){
      instance.doSomething(instance.foo);
    });
  },
 doSomething: function(text){
   alert(text);
  }
}

Is setting up a local var that references the class instance in each
prototype function where another class property or function needs to
be referenced the only solution? Is there a better way?

Thanks,
Steve