Validation on Form Input Field

I have the following code that I'm trying to verify that the www.facebook.com/ is in the URL the user inputs.  It's not working for some reason.  

Here is my html and jquery.

<form class="col-md-12 add-priv-co" action="submit.php" method="post" style="margin-top:20px;margin-bottom:20px;">

                        <label>Competitor Links</label>

                            <div class="form-group rssRow">
                                <span onclick="this.parentNode.parentNode.removeChild(this.parentNode)">X</span>
                                <div class="col-md-6 noPadLeft">
                                    <input class="form-control" name="title[]" placeholder="Competitor Name" />
                                </div>
                                <div class="col-md-6 noPadLeft">
                                    <input class="form-control facebookURL" name="link[]" placeholder="Link" />
                                </div>
                                <div class="clearfix"></div>
                            </div>

                            
                        <input type="hidden" name="submitType" value="25"/>
                        <input type="hidden" name="userID" value="<?php echo $userID;?>"/>
                        <input type="hidden" name="orgID" value="<?php echo $orgID;?>"/>

                        <input type="button" class="btn loginBTN pull-right" id="add-row" name="add-row" value="ADD ROW" />
                        <button class="btn loginBTN">SAVE</button>
                        <script>
                            $('.add-priv-co').submit(function () {
                                var setFBurl = "www.facebook.com/";

                                // Get the Login Name value
                                var name = $('.facebookURL').val();

                                // trim it
                                name = $.trim(name);

                                //make it all lowercase
                                name = name.toLowerCase();

                                if (name.indexOf(setFBurl) < 0){
                                    setTimeout(function() { alert('Please enter a correctly formatted Facebook URL.'); }, 100);
                                    return false;
                                }

                            });
                        </script>
                    </form>

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