// *** 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++ ) {

		// Get the sketch mode stylesheet
    if (link_tag[i].title == "sketch-mode") {

			if(link_tag[i].disabled == true) {	// Only works in IE and Firefox, not WebKit
				link_tag[i].disabled = false;
				set_cookie( style_cookie_name, css_title, style_cookie_duration );
			} else if(link_tag[i].rel == "alternate stylesheet") {
				link_tag[i].disabled = false;
				set_cookie( style_cookie_name, css_title, style_cookie_duration );
			} else {
				link_tag[i].disabled = true;
				delete_cookie(style_cookie_name);
			}

			link_tag[i].rel = "stylesheet";		// Remove alternate from rel tag
    }
  }
}
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 )
{
    // http://www.thesitewizard.com/javascripts/cookies.shtml
    var cookie_string = document.cookie ;
    if (cookie_string.length != 0) {
        var cookie_value = cookie_string.match (
                        '(^|;)[\\s]*' +
                        cookie_name +
                        '=([^;]*)' );
				if(cookie_value) {
					return decodeURIComponent ( cookie_value[2] ) ;
				}
    }
    return '' ;
}
function delete_cookie ( cookie_name, valid_domain )
{
	// http://www.thesitewizard.com/javascripts/cookies.shtml
	var domain_string = valid_domain ? ("; domain=" + valid_domain) : '' ;
	document.cookie = cookie_name + "=; max-age=0; path=/" + domain_string ;
}

window.onload = function() {
	  set_style_from_cookie();
}