JavaScript Access Local Variable with Same Name in Inner and Outer Scope

Given the following JavaScript:

var someFunction = function(id) {
  //do some stuff
  var modifyId = function(id) {
     //do some stuff
     outer.id = id; //is there any way to modify the id variable in the outer scope from here?
  }
}

How do you modify the id passed into the outer function scope from within the inner function scope?