JS : Get, set, clear Cookies

function setcookie(name,value,days)
{
    if (days) {
         var date = new Date();
         date.setTime(date.getTime()+(days*24*60*60*1000));
         var expires = "; expires="+date.toGMTString();
    } else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}
function getcookie(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;
}
function clearcookie(name)
{
    setcookie(name,0,-3650);
}