Preserving a reference to “this” in JavaScript prototype functions [duplicate]

Answer 1

Since you're using jQuery, it's worth noting that this is already maintained by jQuery itself:

$("li").each(function(j,o){
  $("span", o).each(function(x,y){
    alert(o + " " + y);
  });
});

In this example, o represents the li, whereas y represents the child span. And with $.click(), you can get the scope from the event object:

$("li").click(function(e){
  $("span", this).each(function(i,o){
    alert(e.target + " " + o);
  });
});

Where e.target represents the li, and o represents the child span.