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How Can I Limit the Number of Selections Made in a Checkbox Field

  1. FionaFell

    I have a need to limit the number of checkboxes that are chosen in a form.

    (A) Choose 1 category
    (B) Choose up to 3 categories

    If the user chooses (A), so they can only pick one category, from a drop down box.

    What I need to do, is limit the number of selections if they choose (B) as I'm displaying a checkbox list of categories. If I have 72 categories, I want them to only be able to choose a max of 3 (three), not all 72.

    Is this possible? What is the easiest way to implement this?

    Posted 9 years ago on Monday April 9, 2012 | Permalink
  2. black_lady

    Hi, this solution doesn't work for me. I put this code in functions.php and changed input ID, and nothing. Any idea?
    code i put:
    <script type="text/javascript">
    jQuery(document).ready(function($) {

    $.fn.limit = function(n) {
    var self = this;{ return (self.filter(":checked").length<=n); });
    $("ul#input_22_70 li input:checkbox").limit(2);


    Posted 8 years ago on Monday March 4, 2013 | Permalink
  3. black_lady

    Solution from
    is works!
    I put this code into functions.php (at the end) and I recived error.
    But when I put this code on the begining - everythig fine!
    Thanks David :)

    Posted 8 years ago on Tuesday March 5, 2013 | Permalink
  4. Thank you for the update. When it was added to the end, you probably had an issue with an extra or missing <?php or ?> tag. When you inserted it in the beginning, you got it properly in a PHP block. Glad that is working for you now.

    Posted 8 years ago on Wednesday March 6, 2013 | Permalink