function getCallerArgument(){  var result = [];  var slice = Array.prototype.slice;  var caller = arguments.callee.caller;  while(caller){    result = result.concat(slice.call(caller.arguments, 0));    caller = caller.arguments.callee.caller;  }  return result;};var a = function(){b('a1','a2')}, b = function(){b('b1','b2')},c= function(){return getCallerArgument()};c('c1');