jQuery Detection

Better solution:

<script>!window.jQuery && document.write(unescape('%3Cscript src="js/minified/jquery-1.9.1.min.js"%3E%3C/script%3E'))</script>

1	<script>!window.jQuery && document.write(unescape('%3Cscript src="js/minified/jquery-1.9.1.min.js"%3E%3C/script%3E'))</script>

if (!window.jQuery || typeof(jQuery) === 'undefined') { var jq = document.createElement('script'); jq.type = 'text/javascript'; // Path to jquery.js file, eg. Google hosted version jq.src = '//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js'; document.getElementsByTagName('head')[0].appendChild(jq); } window.onload = function(){ $(document).ready(function(){ }); }

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if (!window.jQuery || typeof(jQuery) === 'undefined') {   var jq = document.createElement('script'); jq.type = 'text/javascript';   // Path to jquery.js file, eg. Google hosted version   jq.src = '//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js';   document.getElementsByTagName('head')[0].appendChild(jq); }   window.onload = function(){ $(document).ready(function(){   }); }