Uncaught ReferenceError: $ is not defined at index.js:20 code example

Example 1: reference error $ is not defined jquery

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>

Example 2: corona.html:61 Uncaught ReferenceError: $ is not defined

<script language="JavaScript" type="text/javascript" src="/js/jquery-1.2.6.min.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/jquery-ui-personalized-1.5.2.packed.js"></script>
<script language="JavaScript" type="text/javascript" src="/js/sprinkle.js"></script>

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