function setStyle(style)
     {
     if (document.getElementsByTagName)
          {
          styles = document.getElementsByTagName('link');
          }
     for (i=0;i<styles.length;i++)
          {
          if (styles[i].title)
               {
               styles[i].disabled = true;
               }
          if (styles[i].title == style)
               {
               styles[i].disabled = false;
               }
          }
     
     var expires = new Date();
     expires.setTime(expires.getTime() + 1000*60*60*24*360);
     document.cookie = 'sitestyle=' + escape(style) + '; expires=' + expires.toGMTString() + '; path=/';
     }