Buggy shortcode-function

In a shortcode-function you should use a return statement and never an echo!

function footag_func( $atts ) {
     return "foo = {$atts['foo']}";
}
add_shortcode('footag', 'footag_func');

Please check on http://codex.wordpress.org/Function_Reference/add_shortcode. If you do as I describe, your plugin works fine.

Thanks for your JS-Script anyway.
Greetings
Michel