Checks to see whether jQuery is already loaded

if (typeof jQuery == ‘undefined’) { var jQ = document.createElement(‘script’); jQ.type = ‘text/javascript’; jQ.onload=runthis; jQ.src = ‘http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js’; document.body.appendChild(jQ); } else { runthis(); } function runthis() { // your JavaScript code goes here! }

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