[jQuery] Function: $(...).ancestorsTo(match)

[jQuery] Function: $(...).ancestorsTo(match)

I wrote a method that will provide a list of ancestors for any number of generations until an ancestor matches the expression. Example:
<span style="font-weight: bold;">BODY</span>
  <span style="font-weight: bold;">
DIV</span>
    <span style="font-weight: bold;">UL</span>.myClass
      <span style="font-weight: bold;">LI</span>
        <span style="font-weight: bold;">UL</span>
          <span style="font-weight: bold;">
LI</span> #myId
<span style="font-weight: bold;">$('#myId').ancestors()</span>
returns [UL, LI, UL.myClass, DIV, BODY]
<span style="font-weight: bold;">$('#myId').ancestors("UL.myClass")</span>
returns [UL.myClass]
Returns all elements up to and including the match expression
<span style="font-weight: bold;">$('#myId').ancestorsTo("UL.myClass")</span>
returns [UL, LI, UL.myClass]
Code:
jQuery.fn.ancestorsTo = function(match) {
        var j = $();
        var b = false;
        $(this[0]).ancestors().each(function() {
            if (b == false) {
                j.add(this);
                if ($(this).is(match)) {
                    b = true;
                }
            }
        });
        return j;
    };
Cheers,
-js
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