Sensible parameters

Why is the fields parameter supposed to be specified like this?:

``` javascript
    [
        {
            name: "field1",
            value: "thisisfield1"
        },
        {
            name: "field2",
            value: "thisisfield2"
        }
    ];
```

Instead of this?:

``` javascript
    {
        field1: "thisisfield1",
        field2: "thisisfield2"
    }
```
