jQuery validation of a form name with square brackets

Question

I have the following validation code for a text field but the 'field' below needs to be replaced with the name of the text field, which is created dynamically.

My problem is it has a square bracket in the name - options[483998]

How would I go about adding this to the code below as obviously if I do a direct replace of field with options[483998] it creates invalid coding.

jQuery("#product_addtocart_form").validate({
  rules: {
    field: {
      required: true,
      range: [100, 2540]
    }
  }
});

Answer 1

Demo - http://jsfiddle.net/sY82j/

jQuery("#product_addtocart_form").validate({
  rules: {
    "options[483998]": {
      required: true,
      range: [100, 2540]
    }
  }
});

Answer 2

Just put it in quotes: "options[483998]"