I am needing to style the registration form fields. i am needing to add a custom class to the avatar on the registration page only. i know you Iterate through the fields in the set and display them.

this is what ive tried

<script>



	

document.getElementsByClassName(".img_avatar").className += ' sb-reg-pic';



	

</script>	

but that does not work.

It does work however if i use getElementById but the avatar field has no ID.