How to change the default jQuery version used by WordPress
To override the default jQuery version called by WordPress from 1.3.2 to 1.4.2:
In your theme’s function.php file, Paste this code:
if( !is_admin()){
wp_deregister_script('jquery');
wp_register_script('jquery', ("http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"), false, '1.4.2');
wp_enqueue_script('jquery');
}
Wherever you see ’1.4.2′, you can replace that with whatever wordpress version you are using.
This has been tested in WordPress 2.9.2
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