<?php // Call version 1.4.2 instead of 1.3.2. from Wordpress

function jquery_latest() {
 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' );
 }
}
add_action('init', 'jquery_latest');
// Call in head
wp_enqueue_script( 'jquery' );

<?php // Call version 1.4.2 instead of 1.3.2. from Wordpress

function jquery_latest() {
 if ( !is_admin() {
  wp_deregister_script( 'jquery' );
  wp_register_script( 'jquery', 'http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js' );
 }
}
add_action('init', 'jquery_latest');
// If you want it listed in the wp_head function.....add it this way -
add_action('wp_head', 'jquery_latest');

This is a custom function to place in your theme's "functions.php" file that will override the typical 1.3.2 version of jQuery included in wordpress with the latest 1.4.2 version (and any future release for that matter). This does not effect the admin section as it has been removed via ' !is_admin()'

Calling jQuery 1.4.2 via wordpress

wordpress

PHP