How to target a metric on a button (add to cart, then at checkout) in Drupal Commerce?

Question

Drupal

It turned out to put the target on the button ADD TO CART as follows (in the template.php of the theme):
function bantiki_form_commerce_cart_add_to_cart_form_alter(&$form, &$form_state, $form_id) {
$incart="yaCounterXXXXXX.reachGoal('INCART'); return true;";
$form['submit']['#attributes']['onclick'] = $incart;
}
But in the page code instead of single quotes it is displayed:
onclick="yaCounterXXXXXX.reachGoal('INCART'); return true;"
How can this be fixed? And for the NEXT button when placing an order, it is impossible to display the goal in this way.