Post string without form?

Hello, everyone.
If I use AJaX to POST a string of JSON data without using a form, is it still inserted into the FORM scope, in ColdFusion?
Thank you,
^_^

xhr.open("POST","/path/to/action_page.cfm",false);
xhr.setRequestHeader("Content-type","x-www-form-urlencoded");
xhr.setRequestHeader("Content-Encoding","utf-8");
var thisLength = getLengthInBytes(encodeURI(JSON.stringify(thisArray)));
xhr.setRequestHeader("Content-length",thisLength);
xhr.setRequestHeader("Connection","close");
xhr.send({thisData : ''+encodeURI(JSON.stringify(thisArray)));
var reportText = xhr.responseText;
Web worker.
^_^

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