grzanieplus.pl/plugins/stCurrencyPlugin/modules/stCurrencyBackend/templates/_edit_main.php

<?php echo input_hidden_tag('currency[edit_main]', $currency->getMain()) ?>
<?php echo st_admin_checkbox_tag('currency[edit_main]', 1, $currency->getMain(), array('disabled' => $currency->getMain())) ?>
	`<?php echo input_hidden_tag('currency[edit_main]', $currency->getMain()) ?>`
	`<?php echo st_admin_checkbox_tag('currency[edit_main]', 1, $currency->getMain(), array('disabled' => $currency->getMain())) ?>`