$(function(){
  $(function(){
    $('<a class="sceditor-button sceditor-button-code" unselectable="on" TITLE= TITLE of Button"><div unselectable="on" style="background-image:url(image.png)">Button Name</div></a>').insertBefore('.sceditor-button-size').click(function(){
            $('#text_editor_textarea').sceditor("instance").insertText("[example]","[/example]");
    });
      });
      });

TITLE of Button

image.png

Button Name

sceditor-button-size

[example]

[/example]