This script will allow you to make a field display on a web form but not be editable by users

read-only-infusionsoft-field.js

/*
Instructions: 

In the code below, replace the REPLACE WITH INFUSIONSOFT FIELD NAME with a # and the ID 
of the field(s) you want to make read-only. 

For example, if you were making the Email field read only, you would replace it with #inf_field_Email and the
code would look like this: 

 jQuery('#inf_field_Email').attr('readonly', true);  // Be sure to leave single quotes in place
 
If you were making a custom field named TestField read only, you would replace it with #inf_custom_TestField and the
code would look like this: 

 jQuery('#inf_custom_TestFieldl').attr('readonly', true);  // Be sure to leave single quotes in place

Modify the code below then copy and paste it into an HTML area on your webform.

*/
 
<script type="text/javascript">
    $ = jQuery;
    $(document).ready(function () {
    
    jQuery('REPLACE WITH INFUSIONSOFT FIELD NAME').attr('readonly', true);  // Makes the field read-only
    
    
    });
</script>

Interesting. What are you using this code for? Obviously to make a field not editable, but what is the strategy behind that? I am guessing marketing but I can't quite figure out an application for it.