.spoiler_closed {
display:block;
background-image : url(http://2img.net/i/fa/m/background1.gif);
border: 3px solid #597c57;
-moz-border-radius: 10px;
border-radius: 10px;
padding: 4px;
    }

.spoiler_closed.hidden {
    display:none;
    }
.spoiler_content {
display:block;
background-image : url(http://2img.net/i/fa/m/background1.gif);
border: 3px solid #597c57;
-moz-border-radius: 10px;
border-radius: 10px;
padding: 4px;
    }