"Uncaught ReferenceError: jQuery is not defined" in Apex VisualForce page

"Uncaught ReferenceError: jQuery is not defined" in Apex VisualForce page

Hi,

 

I'm getting the error    "Uncaught ReferenceError: jQuery is not defined" in a Apex VisualForce page.

At the beginning of that page I have the javascript code to load JQuery:

 

 <script type="application/javascript" scr="resource/1352112986000/JQuery_1_8_2_min/jquery-ui-1.9.1.custom/js/jquery-1.8.2.min.js" / >

 

 <script type="text/css" src="resource/1351707675000/JQuery_1_9_1/jquery-ui-1.9.1.custom/css/ui-lightness/jquery-ui-1.9.1.custom.css"/>


 <script type="text/css" src="resource/1351707675000/JQuery_1_9_1/jquery-ui-1.9.1.custom/css/ui-lightness/jquery-ui-1.9.1.custom.min.css"/>

 

 

I got the error at  statement var j$ = jQuery.noConflict(); (I'm using the Google Chrome's Developer Console to debug):

<script type="text/javascript" >
        var j$ = jQuery.noConflict();
  --> Uncaught ReferenceError: jQuery is not defined

 

 

Why JQuery is not being loaded?

 

Thanks,

 

PS: I'm new in Jquery