Referencing A Specific Form Object With A Common "name"

This has really got me stuck. Below is a distillation of my problem:

This is my function:

function Clear(form) {
???.checked = false;
}
<form name="myform">

[Code]....

How do I execute the function to clear the checkbox the moment it is clicked? How do I reference that specific checkbox, when there are multiple checkboxes with the same "name"?

The rules (the above is a simplified version of my actual problem. There is much more to my script, which means other possible solutions cannot be considered):

1. I am aware of onclick="this.checked=false", but I cannot use it.

2. The ID for the checkbox is dynamically generated, whereas the entire onclick command must be the same for all checkboxes.

3. All checkboxes must have the same name, and the name must have square brackets.

4. "this.form" must be in the onClick, as it is used by the rest of the function.