Deselecting all options in HTML SELECT using Jquery plugin

I created my first jQuery plugin today. This plugin will deselect all select option elements after a given timeout when checking an associated checkbox which will in our plugin represent the $(this) object. It can be utilized when you use the data-target attribute. The data-target attribute will automatically select the first option when the checkbox is unchecked. This plugin, however - deselects all options after a given timeout of milliseconds using the setTimeout function. It will keep a pointer to the select object by applying the $() function on a passed in DOM element identifier. Example usage:

     <script type="text/javascript">
                $(function() {
                    $("[name=@SearchParametersDataContract.SomeDOMElementCheckbox]").deselectAfterSelectCheckbox("#@SomeDOMElementSelect",100);
                });
            </script>

The jQuery plugin looks like this:

        <script type="text/javascript">
            $.fn.deselectAllAfterUnselectCheckbox= function(targetSelect, timeout) {
                $(this).on("click",
                    function() {
                        if (timeout === null || timeout == undefined)
                            timeout = 50;
                        $targetSelect = $(targetSelect);
                        if (this.checked === false) {
                            setTimeout(function() {
                                 $targetSelect.children("option").attr("selected", false);
                            }, timeout)
                        };
                    });
            }
        </script>

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