/**
* Stylesheet toggle variation on styleswitch stylesheet switcher.
* Built on jQuery.
* Under an CC Attribution, Share Alike License.
* By Kelvin Luck ( http://www.kelvinluck.com/ )
**/

(function($)
 {
     // Local vars for toggle
     var availableStylesheets = [];
     var activeStylesheetIndex = 0;

     // To loop through available stylesheets
     $.stylesheetToggle = function() {
         activeStylesheetIndex ++;
         activeStylesheetIndex %= availableStylesheets.length;
         $.stylesheetSwitch(availableStylesheets[activeStylesheetIndex]);
     };

     // To switch to a specific named stylesheet
     $.stylesheetSwitch = function(styleName) {
         $('link[@rel*=style][title]').each(
             function(i) {
                 this.disabled = true;
                 if (this.getAttribute('title') == styleName) {
                     this.disabled = false;
                     activeStylesheetIndex = i;
                 }
             }
         );
         createCookie('style', styleName, 365);
     };

     // To initialise the stylesheet with it's 
     $.stylesheetInit = function() {
         $('link[rel*=style][title]').each(
             function(i) {
                 availableStylesheets.push(this.getAttribute('title'));
             }
         );
         var c = readCookie('style');
         if (c) {
             $.stylesheetSwitch(c);
         }
     };
 }
)(jQuery);

// cookie functions http://www.quirksmode.org/js/cookies.html
function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime()+(days*24*60*60*1000));
        var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}
function eraseCookie(name) {
    createCookie(name,"",-1);
}
// /cookie functions