This is part of my use of the yui uploader:

```
function upload() {
    if (fileID != null) {
        uploader.upload(fileID, "http://url",
        'POST',
        {   AWSAccessKeyId: "keyhere",
            acl: "public-read",
            key: "queue/${filename}",
            policy: "somestring",
            Content-Type: "",
            success_action_redirect: "http://urlhere",
            signature: "sigstring"
        },
        'file');
        fileID = null;
    }
}

```

"Content-Type" is causing a syntax error. I can see the problem. But **the amazon s3 bucket that I am posting to is expecting this variable name**.
So I do not have the option to replace the minus with an underscore or to use CamelCase notion.

How can I submit "Content-Type" as variable name?