How can I search window.location.search for specific text?

I have the following code and I want it to show the div only when the part after the "?" includes "gclid=". Note the url could look like xxxxxx.com/?gclid=kljl3j4lk3j4l23 I am not quite sure how to incorporate a partial string search so it only looks for "?gclid" ``` <script type="text/javascript"> $(function(){ if (window.location.search == "?gclid") { $('#new').show(); } else { $('#new').hide(); } }); </script> ``` I am a bit new to this so pardon my ignorance