скрипт изменения стиля
Код:
<!-- *************************************************************** -->
<style>#ChangeStyle{position:relative;z-index:100;}#ChangeStyle td i{display:none!important}</style><span class="StyleChang"></span><table cellspacing="8" align=right id='ChangeStyle'><tr>

<td bgcolor=#999 title="default" ><i>
body {
    --html-bg: #666 url(https://forumstatic.ru/files/001a/cf/3c/93971.jpg);
}

</i></td>

<td bgcolor=#000 title="make darker" ><i>
body {
    --html-bg: #333 url(https://forumstatic.ru/files/001a/cf/3c/20833.jpg)!important;
    --color-back: #e6e6e6!important;
    --color-hz: #e6e6e6!important;
}

</i></td>

<td bgcolor=#125446 title="minimal" ><i>
body {
--color-green: #C57665!important;
--color-black: #112221!important;
--color-red: #749b8a!important;
--html-bg: linear-gradient(#112221, #11463b)!important;
}
#Logo {background: url(https://forumstatic.ru/files/001a/cf/3c/49792.png) bottom left no-repeat!important}
#pun-main h1, .punbb .section h2, #pun-main h2, #pun-debug h2, #pun-stats h2 {
    background: #DFBEAF!important;}
</i></td>

</tr></table><script type="text/javascript">$('#ChangeStyle td').each(function(i){$(this).attr("alt",i)});function setcookie(a,b,c){if(c){var d=new Date();d.setDate(d.getDate()+c)}if(a&&b)document.cookie=a+'='+b+(c?'; expires='+d.toUTCString():'');else return false}function getcookie(a){var b=new RegExp(a+'=([^;]){1,}');var c=b.exec(document.cookie);if(c)c=c[0].split('=');else return false;return c[1]?c[1]:false}function clearSet(L){if(L){setcookie("#ChangeStyle",L,30);$("span.StyleChang").html('<style>'+$("#ChangeStyle td[alt='"+L+"']").find("i").html()+'</style>')}};$('#ChangeStyle td').click(function(){clearSet($(this).attr("alt"))});var Lmem=getcookie("#ChangeStyle");clearSet(Lmem);</script>