function setcookie( name, value, expiry, path ) {  
 if (expiry) {
  var now = new Date();
  now.setTime(now.getTime() + Math.round(86400000*expiry) );
  expiry = now.toGMTString();
  }

 expiry = expiry ? ';expires=' + expiry : '';
 path = path ?'; path=' + path:'';
 document.cookie = name + '=' + escape(value) + expiry + path;
 }

function getcookie( name ) {
 var cookie = document.cookie;
  if (cookie.indexOf( name + '=') < 0 ) { return null; }
   var start = cookie.indexOf(name + '=' ) + name.length + 1;
   var finish = cookie.substring(start, cookie.length );
   finish = (finish.indexOf( ';') < 0 ) ? cookie.length : start + finish.indexOf(';');
   return unescape(cookie.substring( start, finish ) );
 }

function setsheet(name) {
 var l = document.getElementsByTagName('link'), i, o, t;
  for( i=0; (o = l[i]); i++ ) {
   if('alternate stylesheet'===o.getAttribute('rel') && (t = o.getAttribute('title') ) ) {
   o.disabled = true;
   // browser bug: will not enable on next line otherwise
   o.disabled = ( t !== name );
    }
  }
}

function setstyle(id) {
 var name;
//   if( (name = list.options[ list.selectedIndex ].value ) ) {
   if (name = id)  {   
    setcookie('style', name, 90, '/');
    setsheet(name);
//alert("style " +id);
	}
  }