function setcookie(name,value,duration){
 
    if(duration > 0){
        cookiestring=name+"="+escape(value)+";EXPIRES="+getexpirydate(duration);
    }
    else{
        cookiestring=name+"="+escape(value);
    }
     
    document.cookie=cookiestring;
    if(!getcookie(name)){
        return false;
    }
    else{
        return true;
    }
}

function getcookie(cookiename) {
     var cookiestring=""+document.cookie;
     var index1=cookiestring.indexOf(cookiename);
     if (index1==-1 || cookiename=="") return ""; 
     var index2=cookiestring.indexOf(';',index1);
     if (index2==-1) index2=cookiestring.length; 
     return unescape(cookiestring.substring(index1+cookiename.length+1,index2));
}

 function getexpirydate( nodays){
    var UTCstring;
    Today = new Date();
    nomilli=Date.parse(Today);
    Today.setTime(nomilli+nodays*24*60*60*1000);
    UTCstring = Today.toUTCString();
    return UTCstring;
}