localStorage wrapper

/* Overwrite localStorage w/ cookie-based storage if browser does not support */
if(typeof localStorage === "undefined" || localStorage === null){
    (function(){
        function getExpiration(isRemove){
            var date = new Date();
            if(isRemove){
                date.setTime((+date)-1000); //sometime in past
            } else {
                date.setTime((+date)+30758400000); //356 days ahead
            }
            return date.toUTCString();
        }

        function checkReservedWords(test){
            if(test === "setItem" || test === "getItem" ||
                test === "removeItem" || test === "length" ||
                test === "key"){
                return true;
            }
            return false;
        }

        window.localStore = {
            setItem: function(name,value){
                if(checkReservedWords(name)){
                    throw "Cannot use the reserved word '"+name+"' for a localStore key";
                    return;
                }
                document.cookie = name+"="+value+"; expires="+getExpiration()+" path=/";
                if(!name in this){
                    this.length++;
                }
                this[name] = ""+value;
            },
            key: function(index){
                var i = 0;
                for(var item in this){
                    if(checkReservedWords(item)){
                        continue;
                    }
                    if(i === index){
                        return item;
                    }
                    i++;
                }
            },
            getItem: function(name){
                return window.localStore[name];
            },
            removeItem: function(name){
                if(name in this){
                    delete cookies[name];
                    document.cookie = name+"=; expires="+getExpiration(true)+" path=/";
                    this.length--;
                }
            },
            length: 0
        };

        var cookies = document.cookie.split(";"),
        len = cookies.length;
        window.localStore.length = len;
        while(len--){
            var cookie = cookies[len].split("=");
            window.localStore[cookie[0].replace(/^\s*/,"")] = cookie[1];
        }
    })();
} else {
    window.localStore = localStorage;
}

Have to use localStore and not localStorage... because of some issue with Chrome... haven't tested recently to see if its fixed.