using image map resizer

I found the following image map resizer so my image map will be responsive:

http://ift.tt/1CvSQJ1

Following the instructions I placed the following code in the head:

<script src="imageMapResizer.min.js"></script>

<!--[if lt IE 9]>

<script src="http://ift.tt/oHTnA7"></script>

<![endif]-->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!--[if lte IE 8]>
    <script type="text/javascript" src="js/ie8.polyfil.min.js"></script>
<![endif]-->

But I don't know where to place the code:

imageMapResize([selector || map object]);

It says to put it at the bottom of the page. I tried placing it inside of the and outside the tag but it's still not working. Where am I supposed to put it??