The Tor Browser / file revision

 // Any copyright is dedicated to the Public Domain.

 // http://creativecommons.org/licenses/publicdomain/

 var a = 9;

 function directArg(eval, s) {

     var a = 1;

     return eval(s);

 }

 function directVar(f, s) {

     var eval = f;

     var a = 1;

     return eval(s);

 }

 function directWith(obj, s) {

     var f;

     with (obj) {

 	f = function () {

 	    var a = 1;

 	    return eval(s);

 	};

     }

     return f();

 }

 // direct eval, even though 'eval' is an argument

 assertEq(directArg(eval, 'a+1'), 2);

 // direct eval, even though 'eval' is a var

 assertEq(directVar(eval, 'a+1'), 2);

 // direct eval, even though 'eval' is found via a with block

 assertEq(directWith(this, 'a+1'), 2);

 assertEq(directWith({eval: eval, a: -1000}, 'a+1'), 2);

 reportCompare(0, 0);