Añadir botones header a editor

$(function(){
$(function(){
$('<a class="sceditor-button sceditor-button-h2" unselectable="on" title="H2"><div unselectable="on" style="background-image:url(https://static-00.iconduck.com/assets.00/heading-h2-icon-512x284-fwpqhotv.png);background-size:80%;background-position:Center;"></div></a>').insertAfter('.sceditor-button-strike').click(function(){
$('#text_editor_textarea').sceditor("instance").insert("[h2]", "[/h2]");
});
$('<a class="sceditor-button sceditor-button-h3" unselectable="on" title="H3"><div unselectable="on" style="background-image:url(https://static-00.iconduck.com/assets.00/heading-h3-icon-256x143-j6tmiuey.png);background-size:80%;background-position:Center;"></div></a>').insertAfter('.sceditor-button-h2').click(function(){
$('#text_editor_textarea').sceditor("instance").insert("[h3]", "[/h3]");
});
$('<a class="sceditor-button sceditor-button-h4" unselectable="on" title="H4"><div unselectable="on" style="font-size:1em;background-image:url(https://static-00.iconduck.com/assets.00/heading-h4-icon-256x143-7z31mk6z.png);background-size:80%;background-position:Center;"></div></a>').insertAfter('.sceditor-button-h3').click(function(){
$('#text_editor_textarea').sceditor("instance").insert("[h4]", "[/h4]");
});
});
});