// Functions to get and set cookies.

var Cookies = {  
    set: function(name, value, days)  
    {  
        var expires = '';  

        if(!isNaN(days))  
        {  
            var date = new Date();  
            date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000);  
            expires = "; expires=" + date.toGMTString();  
        }  

        document.cookie = name + "=" + escape(value) + expires + "; path=/";  
    },  

    get: function(name, defaultValue)  
    {  
        var regex = new RegExp(name + "s*=s*(.*?)(;|$)");  
        var cookies = document.cookie.toString();  
        var match = cookies.match(regex);  

        if(match)  
            return unescape(match[1]);  

        return defaultValue;  
    },  

    erase: function(name)  
    {  
        Cookies.set(name, '', -1);  
    }
}