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');