<script type="text/javascript">
var linkStyles='<link rel="stylesheet" type="text/css" href="';
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);$("link[rel='stylesheet']:first").replaceWith(linkStyles+L+'"/>')}};var Lmem=getcOOkie("changeStyle");clearSet(Lmem);
</script>

<style>#changeStyle img{border:solid 2px transparent;}
.STYLselect {border-color:#!important;}
</style>
<div id="changeStyle" style="top:30px; left: 20px; position:fixed!important;">
<img src="https://forumstatic.ru/files/001b/0a/8d/35203.jpg" title="Весенний вариант" alt="http://forumstatic.ru/files/001b/8b/c7/10842.css"/>
<br><img src="https://forumstatic.ru/files/0013/b7/c4/15425.jpg" title="Зелёный вариант" alt="http://forumstatic.ru/files/001b/8c/c1/50937.css"/>
</div>

<script>$("#changeStyle img[alt='"+Lmem+"']").addClass("STYLselect");$('#changeStyle img[alt]').click(function(){L=$(this).attr("alt");$('#changeStyle img[alt]').removeClass("STYLselect");$(this).addClass("STYLselect");clearSet(L);window.location=document.URL.replace(/#.\d+$/img,"");});</script>