// *** TO BE CUSTOMISED ***

var style_cookie_name = "page_style" ;
var style_cookie_duration = 730 ;

// *** 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 )
{
    // http://www.thesitewizard.com/javascripts/cookies.shtml
    var cookie_string = document.cookie ;
    if (cookie_string.length != 0) {
	var cookie_value = cookie_string.match (
		'(^|;)[ \t]*' +
		cookie_name +
		'=([^;]*)' );
	return decodeURIComponent ( cookie_value[2] ) ;
    }
    return '' ;
}