wordpress before or after javascript problem

There’s a reason, why one should use the proper hook, which – in this case – is wp_enqueue_scripts.

Then always keep in mind, that some plugins might require a dependency/are dependent on another Javascript library like jQuery.

Now this example shows you how to enqueue your script

• With the right path/URI API function
• With jQuery as dependency
• With a on-demand-caching version number (file name changes, when file contents changes and prevents browser caching in case of an update).
• Loads in the footer to speed up page loading

That’s the right way of loading a script into a WordPress theme.

function wpse64374_register_slider_script()
{
    wp_enqueue_script(
         'easy-slider'
        ,get_stylesheet_directory_uri()."/js/easySlider1.5.js"
        ,array( 'jquery )
        ,filemtime( get_stylesheet_directory()."/js/easySlider1.5.js" )
        ,true
    );
}
add_action( 'wp_enqueue_scripts', 'wpse64374_register_slider_script' );