cookies = {
    saveCookie : function(name,value,days,domain) {
        if (days) {
            var date=new Date();
            date.setTime(date.getTime()+(days*24*60*60*1000));
            var expires="; expires="+date.toGMTString();
        } 
        else expires = "";
        if (domain) {
            domain = ';domain=' + domain;
        } else domain = '';
        document.cookie = name+"="+value+expires+"; path=/" + domain;
    },
    readCookie : function(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;
    },
    deleteCookie : function(name) {
        cookies.saveCookie(name,"",-1);
    }
}