function getCookie(name) {
        var prefix = name + "=";
        var cookieStartIndex = document.cookie.indexOf(prefix);
        if (cookieStartIndex == -1)
                return null;
        var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length);
        if (cookieEndIndex == -1)
                cookieEndIndex = document.cookie.length;
        return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex));
}

function setCookie (name,value,expires,path,domain,secure) //set value of cookie
{ 
var newCookie = name + "=" + escape(value) + 
((expires)? ";expires=" +expires.toGMTString():"")+ 
((path)? ";path=" + path                       :"")+
((domain)? ";domain=" + domain                 :"")+
((secure)? ";secure"                           :"");
document.cookie = newCookie; 
}

function deleteCookie(name,path,domain)
{
if (getCookie(name))
  {
  document.cookie = name + "=" +
  ";expires=Thu, 01-Jan-70 00:00:01 GMT" +
  ((path) ? ";path=" +path        :"")+
  ((domain) ? ";domain=" + domain :"");
  }
}