function convertToRecurring() {
    if (document.getElementById('auto_renew_checkbox').checked == false) {
        if (
              document.getElementById('select_item_name')[document.getElementById('select_item_name').selectedIndex].value == '1' ||
              document.getElementById('select_item_name')[document.getElementById('select_item_name').selectedIndex].value == '3' ||
              document.getElementById('select_item_name')[document.getElementById('select_item_name').selectedIndex].value == '5'
            ) {
                document.getElementById('paypal_a3').value = document.getElementById('item_amount').value
                document.getElementById('paypal_p3').value = '1';
                document.getElementById('paypal_t3').value = 'Y';
                document.getElementById('paypal_cmd').value = '_xclick-subscriptions';
              }
    } else {
        document.getElementById('paypal_cmd').value = '_xclick';
    }
}