Making a Web Page Text Field Accessible to JavaScript

Consider the HTML source for the SMILES input text field in the CLOGP web page:

        <FORM NAME="smilesForm" METHOD=POST
                                    ACTION="/daycgi/clogpeditorsubmit">
            <SELECT NAME="inputTypeSelector" SELECTED>
                <OPTION>SMILES
                <OPTION>Invoke CGI-Grins
            </SELECT>
            <INPUT NAME="smiles" SIZE=30 VALUE="'"${SMI}" '">
            <INPUT TYPE=SUBMIT NAME="Submit" VALUE="submit">
        </FORM>'

Each Form element has a NAME attribute. The name can be anything you want.
Given this naming scheme, JavaScript would access the SMILES input field as

smilesForm.smiles

This name has to be used in the JavaScript function that invokes JavaGrins