Alternating CSS stylesheet - Cookie part

[riseguim]

Hi,

so I have this script that alternates my CSS stylesheets and it's working great. The thing is, there was a cookie coding that was included but it doesn't work. Basically what I want to do is that the browser remembers which stylesheet the user had chosen and keep it the same for all pages, for a determined period of time.

Here's my code:

<script type="text/javascript">
// *** TO BE CUSTOMISED ***

var style_cookie_name = "style" ;
var style_cookie_duration = 30 ;

// *** END OF CUSTOMISABLE SECTION ***

function switch_style ( css_title )
{
// You may use this script on your site free of charge provided
// you do not remote this notice or the URL below. Script from
// http://www.thesitewizard.com/javascripts/change-style-sheets.shtml
  var i, link_tag ;
  for (i = 0, link_tag = document.getElementsByTagName("link") ;
    i < link_tag.length ; i++ ) {
    if ((link_tag[i].rel.indexOf( "stylesheet" ) != -1) &&
      link_tag[i].title) {
      link_tag[i].disabled = true ;
      if (link_tag[i].title == css_title) {
        link_tag[i].disabled = false ;
      }
    }
    set_cookie( style_cookie_name, css_title,
      style_cookie_duration );
  }
}
function set_style_from_cookie()
{
  var css_title = get_cookie( style_cookie_name );
  if (css_title.length) {
    switch_style( css_title );
  }
}
function set_cookie ( cookie_name, cookie_value,
    lifespan_in_days, valid_domain )
{
    // http://www.thesitewizard.com/javascripts/cookies.shtml
    var domain_string = valid_domain ?
                       ("; domain=" + valid_domain) : '' ;
    document.cookie = cookie_name +
                       "=" + encodeURIComponent( cookie_value ) +
                       "; max-age=" + 60 * 60 *
                       24 * lifespan_in_days +
                       "; path=/" + domain_string ;
}
function get_cookie ( cookie_name )
{
    var cookie_string = document.cookie ;
    if (cookie_string.length != 0) {
        var cookie_value = cookie_string.match (
                        '(^|;)[\s]*' +
                        cookie_name +
                        '=([^;]*)' );
        return decodeURIComponent ( cookie_value[2] ) ;
    }
    return '' ;
}
</script>

[riseguim]

any ideas?

[riseguim]

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