Code:

a[href="/u1"] {
    background: url("http://illiweb.com/fa/admin/couronne.png") no-repeat;
    padding-left: 19px;
    padding-top: 2px;
}

Add this code to CSS Stylesheet.

But what I need to put here:

a[href="/u1"] {

I don't understand you? Only put the code I show.

Okay...

But it didn't appear.

Hi,

Try using this. Add it to AP > Modules > JS managment and mark all pages.

Code:

/* Kruna ispred nicka administratora. By BubbleDreams 2011 -
AdminCentar.net . Nemoj uklanjati copyright! Don't remove copyright! */
 
$(function() {
if($('a[href="/u1"] span strong')){
            $('a[href="/u1"] span strong').before('<img src="http://cdn2.iconfinder.com/data/icons/ledicons/crown.png" border="0" />');
    }
});

But it doesn't appear. I want to add it to only my account.

It will be added to your account only. I'm not sure you are doing it correctly. You have a phpBB3 forum and this is the script working my test phpBB3 forum
http://someonelikeyou.forumcroatian.com/

Is your JS enabled?

Edit: Is this your profile Argos Theodor Ürklainen? That's the 25 registered, u25.
I can't read your language but the script works on the founder of the forum. The u1 in the script represents the first registered. You have to change it to the number you are on the board if you are not the founder. You get the number by clicking on your name on the board and taking it from the browser. On FM mine would be
/u42273

Okay, I got it. Thanks to everyone! Someone may close it.

eccato wrote:Okay, I got it. Thanks to everyone! Someone may close it.

Topic solved