I need to convert a js object to another object for passing onto a server post where the names of the keys differ for example

```
var a = {
    name : "Foo",
    amount: 55,
    reported : false,
    ...
    <snip/>
    ...
    date : "10/01/2001"
    } 

```

needs to turn into 

```
a = {
  id : "Foo",
  total : 55,
  updated: false,
  ...
  <snip/>
  ... 
  issued : "10/01/2001"
  }

```

where I have lookup obj available for mapping all the keys

```
var serverKeyMap = {
    name : "id",
    amount : "total",
    reported : "updated",
     ...
    date : "issue"
    }

```

Is there a function available in underscore.js or jQuery that I can use that does this functionality? 

thanks