Account view.edit.php

I want to add custom js for account edit page, i want to make some field read only, so 've created a view.edit.php and insert this code:

class AccountsViewEdit extends ViewEdit
 	public function __construct()
 		$this->useForSubpanel = true;
 		$this->useModuleQuickCreateTemplate = true;
		echo <<<EOHTML


the js works, but i don’t know why the html of the edit page fucks up like this

Someone know why this happens and know how to fix this?
thanks all