<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:red!important;}
    </style>
    <div id="changeStyle" style="top:0; left: 3px; position:fixed!important;">
    <img src="http://forumstatic.ru/files/0015/3e/ec/36355.jpg" alt="http://forumstatic.ru/files/0015/bf/d8/86806.css"/>
    <br>
    <img src="http://forumstatic.ru/files/0015/3e/ec/33607.jpg" alt="http://forumstatic.ru/files/0015/3e/ec/94586.css"/>
    <br>
    </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)});</script>