Because the EADRequest.html pages use javascript to pare down the request information before trying to submit it to the DLL, the fields in these request forms are different than in the default request pages.
Field Formats
Fields used on the EADRequest.html form (including hidden inputs) must have their name attribute set to "FormDataField" and the id attribute set to the database name for the field. For example, the <select> element for the RequestLink field and the <input> element for the hidden DocumentType field are typically configured as follows on web forms, with the database name of the field used as the name attribute value:
<select class="custom-select mr-sm-2" id="RequestLink" name="RequestLink" size="1"><input type="hidden" name="DocumentType" value="Manuscript">
When configured on EADRequest.html (or used in an include file referenced on EADRequest.html), these fields should have the name attribute set to "FormDataField" and the id attribute set to the database name for the field:
<select class="custom-select mr-sm-2" id="RequestLink" name="FormDataField" size="1"><input type="hidden" ID="DocumentType" name="FormDataField" value="Manuscript">