/**
* 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