send inquiry name and email

[Alex.1]

Hi

When sending an inquiry an user can change their name and email address. 

Is it possible to make these input fields disabled?

I have tried this: 

<script>
	 function myFunction() {
	   document.getElementById("jr-inquiry-from_email").disabled = true;
	 }
 </script>

but doesn't work.  

Thank you.

[Alejandro]

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