document.write('<style>body {margin-top:50px !important;}</style>');
document.write('<div style="position: absolute; width: 304px; height: 38px; z-index: 1; left: -60px; top: 15px" id="skinselector"><form><select onchange="changeskin(this.options[this.selectedIndex].value); window.location.reload();"><option> Cambiar de Skin </option><option value="skin1"> skin1 </option><option value="skin2"> skin2 </option><option value="skin3"> skin3 </option></select></form></div>');
var scheme = getCookie('template1');
if (scheme == 'skin1') {
document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="http://pmsc.free.fr/CSS/08924214319.css">');
} else if (scheme == 'skin2') {
document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="http://pmsc.free.fr/CSS/08924214438.css">');
} else if (scheme == 'skin3') {
document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="http://pmsc.free.fr/CSS/08924214602.css">');
}

function changeskin(change) {
var scheme = change;
var name = 'template1';
var pathname = location.pathname;
var myDomain = pathname.substring(0,pathname.lastIndexOf('/')) +'/';
var ExpDate = new Date ();
ExpDate.setTime(ExpDate.getTime() + (180 * 24 * 3600 * 1000));
setCookie(name,scheme,ExpDate,myDomain);
}
function getCookie(name){
var cname = name + "=";
var dc = document.cookie;
if (dc.length > 0) {
begin = dc.indexOf(cname);
if (begin != -1) {
begin += cname.length;
end = dc.indexOf(";", begin);
if (end == -1) end = dc.length;
return unescape(dc.substring(begin, end));
}
}
return null;
}

function setCookie(name, value, expires, path, domain, secure) {
document.cookie = name + "=" + escape(value) +
((expires == null) ? "" : "; expires=" + expires.toGMTString()) +
((path == null) ? "" : "; path=" + path) +
((domain == null) ? "" : "; domain=" + domain) +
((secure == null) ? "" : "; secure");
}

Read more: http://forumtricks.com/foro/viewtopic.php?f=48&t=23#ixzz0H8cxIVQG&B
