jQuery Forum

Could you let us know what browser you're using and also verify that
you have cookies enabled?
A quick test shows the switcher saving a cookie on my browsers.
You might try the switcher in this demo to make sure it's saving state
for you as well: http://filamentgroup.com/examples/daterangepicker_v2/
Thanks

I have them enabled. I have downloaded the script and altered as I
needed (only added 1 theme, duplicated code exactly as other themes)
and am running it locally versus over the google library. It switches
fine, but doesn't save if I close the browser. Have tested in IE7,
IE8, Safar 4, Safari 3. Only browsers my organization uses internally
are those two.
I will try the source for the one you have provided and get back to
you.
My current code is below.
/* jQuery plugin themeswitcher
---------------------------------------------------------------------
*/
$.fn.themeswitcher = function(settings){
    var options = jQuery.extend({
        loadTheme: null,
        initialText: 'Switch Theme',
        width: 150,
        height: 200,
        buttonPreText: 'Theme: ',
        closeOnSelect: true,
        buttonHeight: 14,
        cookieName: 'jquery-ui-theme',
        onOpen: function(){},
        onClose: function(){},
        onSelect: function(){}
    }, settings);
    //markup
    var button = $('<a href="#" class="jquery-ui-themeswitcher-
trigger"><span class="jquery-ui-themeswitcher-icon"></span><span
class="jquery-ui-themeswitcher-title">'+ options.initialText +'</
span></a>');
    var switcherpane = $('<div class="jquery-ui-themeswitcher"><div
id="themeGallery">    <ul>        <li><a href="../css/themes/data/jquery-
ui.css">            <img src="../css/themes/screens/theme_30_data_default.png"
alt="DATA" title="DATA" />            <span class="themeName">DATAGROUP</span>
</a></li>                <li><a href="../css/themes/ui-lightness/jquery-ui.css">
<img src="../css/themes/screens/theme_30_ui_light.png" alt="UI
Lightness" title="UI Lightness" />            <span class="themeName">UI
lightness</span>        </a></li>                <li><a href="../css/themes/ui-darkness/
jquery-ui.css">            <img src="../css/themes/screens/
theme_30_ui_dark.png" alt="UI Darkness" title="UI Darkness" />            <span
class="themeName">UI darkness</span>        </a></li>            <li><a href="../css/
themes/smoothness/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_smoothness.png" alt="Smoothness" title="Smoothness" />
<span class="themeName">Smoothness</span>        </a></li>                    <li><a
href="../css/themes/start/jquery-ui.css">            <img src="../css/themes/
screens/theme_30_start_menu.png" alt="Start" title="Start" />            <span
class="themeName">Start</span>        </a></li>        <li><a href="../css/themes/
redmond/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_windoze.png" alt="Redmond" title="Redmond" />            <span
class="themeName">Redmond</span>        </a></li>        <li><a href="../css/
themes/cupertino/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_cupertino.png" alt="Cupertino" title="Cupertino" />            <span
class="themeName">Cupertino</span>                </a></li>        <li><a href="../css/
themes/south-street/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_south_street.png" alt="South St" title="South St" />            <span
class="themeName">South Street</span>                </a></li>        <li><a href="../
css/themes/blitzer/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_blitzer.png" alt="Blitzer" title="Blitzer" />            <span
class="themeName">Blitzer</span>        </a></li>            <li><a href="../css/
themes/humanity/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_humanity.png" alt="Humanity" title="Humanity" />            <span
class="themeName">Humanity</span>        </a></li>            <li><a href="../css/
themes/hot-sneaks/jquery-ui.css">        <img src="../css/themes/screens/
theme_30_hot_sneaks.png" alt="Hot Sneaks" title="Hot Sneaks" />
<span class="themeName">Hot sneaks</span>        </a></li>            <li><a href="../
css/themes/excite-bike/jquery-ui.css">            <img src="../css/themes/
screens/theme_30_excite_bike.png" alt="Excite Bike" title="Excite
Bike" />            <span class="themeName">Excite Bike</span>            </a></li>
<li><a href="../css/themes/vader/jquery-ui.css">            <img src="../css/
themes/screens/theme_30_black_matte.png" alt="Vader" title="Vader" /
>            <span class="themeName">Vader</span>            </a></li>                <li><a
href="../css/themes/dot-luv/jquery-ui.css">            <img src="../css/themes/
screens/theme_30_dot_luv.png" alt="Dot Luv" title="Dot Luv" />            <span
class="themeName">Dot Luv</span>            </a></li>            <li><a href="../css/
themes/mint-choc/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_mint_choco.png" alt="Mint Choc" title="Mint Choc" />            <span
class="themeName">Mint Choc</span>        </a></li>        <li><a href="../css/
themes/black-tie/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_black_tie.png" alt="Black Tie" title="Black Tie" />            <span
class="themeName">Black Tie</span>        </a></li>        <li><a href="../css/
themes/trontastic/jquery-ui.css">            <img src="../css/themes/screens/
theme_30_trontastic.png" alt="Trontastic" title="Trontastic" />
<span class="themeName">Trontastic</span>            </a></li>            <li><a
href="../css/themes/swanky-purse/jquery-ui.css">            <img src="../css/
themes/screens/theme_30_swanky_purse.png" alt="Swanky Purse"
title="Swanky Purse" />            <span class="themeName">Swanky Purse</
span>            </a></li>    </ul></div></div>').find('div').removeAttr('id');
    //button events
    button.click(
        function(){
            if(switcherpane.is(':visible')){ switcherpane.spHide(); }
            else{ switcherpane.spShow(); }
                    return false;
        }
    );
    //menu events (mouseout didn't work...)
    switcherpane.hover(
        function(){},
        function(){if(switcherpane.is(':visible')){$(this).spHide();}}
    );
    //show/hide panel functions
    $.fn.spShow = function(){ $(this).css({top: button.offset().top +
options.buttonHeight + 6, left: button.offset().left}).slideDown(50);
button.css(button_active); options.onOpen(); }
    $.fn.spHide = function(){ $(this).slideUp(50, function()
{options.onClose();}); button.css(button_default); }
    /* Theme Loading
    ---------------------------------------------------------------------
*/
    switcherpane.find('a').click(function(){
        updateCSS( $(this).attr('href') );
        var themeName = $(this).find('span').text();
        button.find('.jquery-ui-themeswitcher-title').text
( options.buttonPreText + themeName );
        $.cookie(options.cookieName, themeName);
        options.onSelect();
        if(options.closeOnSelect && switcherpane.is(':visible'))
{ switcherpane.spHide(); }
        return false;
    });
    //function to append a new theme stylesheet with the new style
changes
    function updateCSS(locStr){
        var cssLink = $('<link href="'+locStr+'" type="text/css"
rel="Stylesheet" class="ui-theme" />');
        $("head").append(cssLink);
        if( $("link.ui-theme").size() > 3){
            $("link.ui-theme:first").remove();
        }
    }
    /* Inline CSS
    ---------------------------------------------------------------------
*/
    var button_default = {
        fontFamily: 'Trebuchet MS, Verdana, sans-serif',
        fontSize: '11px',
        color: '#666',
        background: '#eee url(http://jqueryui.com/themeroller/
themeswitchertool/images/buttonbg.png) 50% 50% repeat-x',
        border: '1px solid #ccc',
        '-moz-border-radius': '6px',
        '-webkit-border-radius': '6px',
        textDecoration: 'none',
        padding: '3px 3px 3px 8px',
        width: options.width - 11,//minus must match left and right padding
        display: 'block',
        height: options.buttonHeight,
        outline: '0'
    };
    var button_hover = {
        'borderColor':'#bbb',
        'background': '#f0f0f0',
        cursor: 'pointer',
        color: '#444'
    };
    var button_active = {
        color: '#aaa',
        background: '#000',
        border: '1px solid #ccc',
        borderBottom: 0,
        '-moz-border-radius-bottomleft': 0,
        '-webkit-border-bottom-left-radius': 0,
        '-moz-border-radius-bottomright': 0,
        '-webkit-border-bottom-right-radius': 0,
        outline: '0'
    };
    //button css
    button.css(button_default)
    .hover(
        function(){
            $(this).css(button_hover);
        },
        function(){
         if( !switcherpane.is(':animated') && switcherpane.is(':hidden') ){    $
(this).css(button_default); }
        }
    )
    .find('.jquery-ui-themeswitcher-icon').css({
        float: 'right',
        width: '16px',
        height: '16px',
        background: 'url(http://jqueryui.com/themeroller/themeswitchertool/
images/icon_color_arrow.gif) 50% 50% no-repeat'
    });
    //pane css
    switcherpane.css({
        position: 'absolute',
        float: 'left',
        fontFamily: 'Trebuchet MS, Verdana, sans-serif',
        fontSize: '12px',
        background: '#000',
        color: '#fff',
        padding: '8px 3px 3px',
        border: '1px solid #ccc',
        '-moz-border-radius-bottomleft': '6px',
        '-webkit-border-bottom-left-radius': '6px',
        '-moz-border-radius-bottomright': '6px',
        '-webkit-border-bottom-right-radius': '6px',
        borderTop: 0,
        zIndex: 999999,
        width: options.width-6//minus must match left and right padding
    })
    .find('ul').css({
        listStyle: 'none',
        margin: '0',
        padding: '0',
        overflow: 'auto',
        height: options.height
    }).end()
    .find('li').hover(
        function(){
            $(this).css({
                'borderColor':'#555',
                'background': 'url(http://jqueryui.com/themeroller/
themeswitchertool/images/menuhoverbg.png) 50% 50% repeat-x',
                cursor: 'pointer'
            });
        },
        function(){
            $(this).css({
                'borderColor':'#111',
                'background': '#000',
                cursor: 'auto'
            });
        }
    ).css({
        width: options.width-30,
        height: '',
        padding: '2px',
        margin: '1px',
        border: '1px solid #111',
        '-moz-border-radius': '4px',
        clear: 'left',
        float: 'left'
    }).end()
    .find('a').css({
        color: '#aaa',
        textDecoration: 'none',
        float: 'left',
        width: '100%',
        outline: '0'
    }).end()
    .find('img').css({
        float: 'left',
        border: '1px solid #333',
        margin: '0 2px'
    }).end()
    .find('.themeName').css({
        float: 'left',
        margin: '3px 0'
    }).end();
    $(this).append(button);
    $('body').append(switcherpane);
    switcherpane.hide();
    if( $.cookie(options.cookieName) || options.loadTheme ){
        var themeName = $.cookie(options.cookieName) || options.loadTheme;
        switcherpane.find('a:contains('+ themeName +')').trigger('click');
    }
    return this;
};
/**
* Cookie plugin
*
* Copyright (c) 2006 Klaus Hartl (stilbuero.de)
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
*/
jQuery.cookie = function(name, value, options) {
if (typeof value != 'undefined') { // name and value given, set
cookie
options = options || {};
if (value === null) {
value = '';
options.expires = -1;
}
var expires = '';
if (options.expires && (typeof options.expires == 'number' ||
options.expires.toUTCString)) {
var date;
if (typeof options.expires == 'number') {
date = new Date();
date.setTime(date.getTime() + (options.expires * 24 *
60 * 60 * 1000));
} else {
date = options.expires;
}
expires = '; expires=' + date.toUTCString(); // use
expires attribute, max-age is not supported by IE
}
// CAUTION: Needed to parenthesize options.path and
options.domain
// in the following expressions, otherwise they evaluate to
undefined
// in the packed version for some reason...
var path = options.path ? '; path=' + (options.path) : '';
var domain = options.domain ? '; domain=' + (options.domain) :
'';
var secure = options.secure ? '; secure' : '';
document.cookie = [name, '=', encodeURIComponent(value),
expires, path, domain, secure].join('');
} else { // only name given, get cookie
var cookieValue = null;
if (document.cookie && document.cookie != '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we
want?
if (cookie.substring(0, name.length + 1) == (name +
'=')) {
cookieValue = decodeURIComponent(cookie.substring
(name.length + 1));
break;
}
}
}
return cookieValue;
}
};

Okay so I tried using the default, without my customizations, like the
actual link from jquery.com and it still doesn't work. But I have
another cookie object on my page and that one works.