function add_gallery_button($context){
?>
        <script>
            function insertSGGallery(){
                var win = window.dialogArguments || opener || parent || top;
                win.send_to_editor("[simon-gallery]");
            }
        </script>
<?php
	$addgallerybutton = WP_PLUGIN_URL.'/'.str_replace(basename( __FILE__),"",plugin_basename(__FILE__))."elements/sg-button.png";
    $out = '<a onClick = "insertSGGallery()" title="Add Gallery"><img src="'.$addgallerybutton.'" alt="Add Gallery Button" /></a>';
    return $context . $out;
}