Simulate onclick if certain radio button is selected

[Eiolon]

I am using a script that simulates an onclick if a checkbox was selected when my record loads, but have not been able to modify it for a radio button and if a certain value is selected.

 

Here is what I am using:

 

<script type="text/javascript">
window.onload = function() {
  if (document.forms[0].checkboxname.checked == true) {
    document.forms[0].checkboxname.onclick();
  }

}
</script>

 

Any ideas?  thnaks!

[AyKay47]

why can't you simply invoke an onclick event from the input tag?

 

<input type="radio" name="group1" value="Milk" onclick="someFunc()"> Milk<br>