Include jquery if not included

<!--
	Checks to see if jquery is defined
	If jQuery is NOT detected, include the script.
-->
<script type="text/javascript">
    if(typeof jQuery == 'undefined'){
        var foo = document.createElement("script");
        foo.type = "text/javascript";
        foo.src = "https://code.jquery.com/jquery-1.12.4.min.js"; // add path to jQuery script here
        document.head.insertBefore(foo, document.head.getElementsByTagName("script")[0])
    }
</script>

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