how to call a javascript function on radio button's 'checked' property?

Question

I have N number of radio button groups in the page with auto generated names.

I want to call a javascript function as the value of the checked property. THIS LINE EXCLUDED AFTER EDIT ( Depending on the return value, the radio button needs to be checked or unchecked.)

<input type="radio" name="auto_generated_name" value="some_value" checked="test_check(args);" />

and the javascript function is

function test_check(params) {
    if(conditions){
        return true;
    }
    else 
        return false;    
}

But that does not work. Whatever value I assign to 'checked' property, be it any javascript function or any string etc, the radio button becomes checked.

How can I achieve my goal?

EDIT:

 <input type="radio" name="auto_generated_name" value="somevalue" onclick="test_check(args)"/>

4 radio buttons make a group. such N radio groups have html class names in this way : button_group_1, button_group_2, button_group_3, button_group_4 etc.

The 'args' need to be these class (i.e. radio button group) names and the corresponding values (from value="1", value="2", value="3" and value="4" ).

Cookies with the class names and values will be created inside the javascript function.

On page refresh, cookies matching with the class names will be checked and depending on the existence of the corresponding cookies, the radio button will be checked or unchecked.

How to achieve the goals/

Answer 1

Assuming you are using jQuery, use the change event: http://api.jquery.com/change/