source: trunk/www.guidonia.net/wp/wp-admin/js/utils.dev.js@ 44

// utility functions
function convertEntities(o) {
        var c, v;
        c = function(s) {
                if (/&[^;]+;/.test(s)) {
                        var e = document.createElement("div");
                        e.innerHTML = s;
                        return !e.firstChild ? s : e.firstChild.nodeValue;
                }
                return s;
        }

        if ( typeof o === 'string' ) {
                return c(o);
        } else if ( typeof o === 'object' ) {
                for (v in o) {
                        if ( typeof o[v] === 'string' ) {
                                o[v] = c(o[v]);
                        }
                }
        }
        return o;
}

var wpCookies = {
// The following functions are from Cookie.js class in TinyMCE, Moxiecode, used under LGPL.

        each : function(o, cb, s) {
                var n, l;

                if (!o)
                        return 0;

                s = s || o;

                if (typeof(o.length) != 'undefined') {
                        for (n=0, l = o.length; n<l; n++) {
                                if (cb.call(s, o[n], n, o) === false)
                                        return 0;
                        }
                } else {
                        for (n in o) {
                                if (o.hasOwnProperty(n)) {
                                        if (cb.call(s, o[n], n, o) === false) {
                                                return 0;
                                        }
                                }
                        }
                }
                return 1;
        },

        getHash : function(n) {
                var v = this.get(n), h;

                if (v) {
                        this.each(v.split('&'), function(v) {
                                v = v.split('=');
                                h = h || {};
                                h[v[0]] = v[1];
                        });
                }
                return h;
        },

        setHash : function(n, v, e, p, d, s) {
                var o = '';

                this.each(v, function(v, k) {
                        o += (!o ? '' : '&') + k + '=' + v;
                });

                this.set(n, o, e, p, d, s);
        },

        get : function(n) {
                var c = document.cookie, e, p = n + "=", b;

                if (!c)
                        return;

                b = c.indexOf("; " + p);

                if (b == -1) {
                        b = c.indexOf(p);

                        if (b != 0)
                                return null;

                } else {
                        b += 2;
                }

                e = c.indexOf(";", b);

                if (e == -1)
                        e = c.length;

                return decodeURIComponent(c.substring(b + p.length, e));
        },

        set : function(n, v, e, p, d, s) {
                document.cookie = n + "=" + encodeURIComponent(v) +
                        ((e) ? "; expires=" + e.toGMTString() : "") +
                        ((p) ? "; path=" + p : "") +
                        ((d) ? "; domain=" + d : "") +
                        ((s) ? "; secure" : "");
        },

        remove : function(n, p) {
                var d = new Date();

                d.setTime(d.getTime() - 1000);

                this.set(n, '', d, p, d);
        }
};

// Returns the value as string. Second arg or empty string is returned when value is not set.
function getUserSetting( name, def ) {
        var o = getAllUserSettings();

        if ( o.hasOwnProperty(name) )
                return o[name];

        if ( typeof def != 'undefined' )
                return def;

        return '';
}

// Both name and value must be only ASCII letters, numbers or underscore
// and the shorter, the better (cookies can store maximum 4KB). Not suitable to store text.
function setUserSetting( name, value, del ) {
        if ( 'object' !== typeof userSettings )
                return false;

        var c = 'wp-settings-' + userSettings.uid, o = wpCookies.getHash(c) || {}, d = new Date(), p,
        n = name.toString().replace(/[^A-Za-z0-9_]/, ''), v = value.toString().replace(/[^A-Za-z0-9_]/, '');

        if ( del ) {
                delete o[n];
        } else {
                o[n] = v;
        }

        d.setTime( d.getTime() + 31536000000 );
        p = userSettings.url;

        wpCookies.setHash(c, o, d, p);
        wpCookies.set('wp-settings-time-'+userSettings.uid, userSettings.time, d, p);

        return name;
}

function deleteUserSetting( name ) {
        return setUserSetting( name, '', 1 );
}

// Returns all settings as js object.
function getAllUserSettings() {
        if ( 'object' !== typeof userSettings )
                return {};

        return wpCookies.getHash('wp-settings-' + userSettings.uid) || {};
}