Load the jQuery library from Google CDN

Wordpress itself uses the jquery in all wordpress themes and loads automatically. But it is always good to load the jquery library through google CDN. It saves your sites bandwidth. Many people already written about same so here I am just putting the method.
Load the jQuery in the wordpress footer

Load the jQuery in the wordpress footer

Many latest framework are loading all javascript in footer. They reduse the page loading the errors. But wordpress load the jquery and other javascript in header. But using following code you can load your javascripts and jquery in footer area. You just need to copy and paste the following code into the functions.php file.
Add javascript to wordpress through plugin

Add javascript to wordpress through plugin

You can add the any javascript through theme. But some times many clients wants simple wordpess plugin which will inject javascript code into wordpress site. Here I will give very simple wordpress plugin code which inject the javascript tag into head section of wordpress site. You need to use my following code for creating the wp plugin.
How to implement the Jquery UI datepicker in wordpress

How to implement the Jquery UI datepicker in wordpress

How can use the Jquery UI in your wordpress theme and plugin using following code. For adding the datepicker in theme you need to just add the following code in functions.php file. Some WP developers use the plugins to add the datepicker in wordpress. But you can add the Jquery datepicker in wordpress.
Add the Comment Preview to Comment box without WordPress Plugin

Add the Comment Preview to Comment box without WordPress Plugin

Many times comments preview will be useful for visitors to see how comments will be looking. Using google Jquery or wordpress jquery you can add the comment preview to your wordpress blog. In this tutorial I am using the wordpress inbuild jquery. First open your header. php file from your theme folder and after head tag following code.
add ajax pagination in wordpress blog

add ajax pagination in wordpress blog

For without refresh the data from home page if you want to show the pages and pagination in wordpress blog than you can use the following code. Ajax wordpress pagination code is very simple and useful for wp developers. With the help of jquery you can easily add the pagination wordpress blog site. You just need to add the following code into header.php file.
smart way to use jquery in wordpress theme

smart way to use jquery in wordpress theme

In wordpress adding the Jquery is very easy because wordpress itself uses the Jquery for admin panel. They provided the wordpress api for adding the jquery in wordpress theme files. wp developers are always looking for wordpress jquery plugin, wordpress include jquery, wordpress jquery ui, wordpress jquery noconflict, wordpress jquery theme, wordpress jquery version, wordpress jquery slider, wordpress jquery not working. Here is the solution
wordpress and jquery conflicts – How to solve that

wordpress and jquery conflicts – How to solve that

Jquery is most powerful javascript framework and which is used widely. Wordpress is most powerful and famous cms in the world. When you are using the jquery in wordpress that time you need to keep in mind some issues. Wordpress itself uses the jquery in there framework. But when we tries to add the different versions of jquery and there plugins, there was issue or conflict with jquery. Sometimes I saw issue with some plugins due to different versions of jquery. I shown in this tutorial, how to solve the jquery conflicts easily.