<script type="text/javascript" src="http://help4us.ru/include/js/jquery.js"></script>

<style>
#button-spoiler {background-image:url('https://forumupload.ru/uploads/0000/12/13/488-1.gif'); padding:0; line-height:0; background-position:center; background-repeat:no-repeat; height:26px; width:100%}
</style>
<script type="text/javascript">
function tag_spolier()
{var FoundErrors = '';
var enterTITLE = prompt("Введите описание спойлера", 'Спойлер');
bbcode('
',('|'+enterTITLE+'
'));}
if(form=document.getElementById("form-buttons"))
form.getElementsByTagName("tr")[0].insertCell(19).innerHTML="<img src='/i/blank.gif' title='Вставить спойлер' id='button-spoiler' onclick=\"tag_spolier()\">"
function addSpoilerSpoiler(str,from,internal){
var pos=0,pos2=0,newpos=0
if((pos=str.indexOf("
    ",from))==-1) return str; if((pos2=str.indexOf("

"),pos+9)==-1) return str;
newpos=str.indexOf("
    ",pos+9) if(newpos<pos2 && newpos!=-1) str=addSpoiler(str,pos+9,true) if((pos2=str.indexOf("

",pos+9))==-1) return str;

txt = str.substring(pos+9,pos2);
if((sepPos=txt.indexOf("|",0))==-1) return str;