function strreplace(haystack,needle,str) {
 while(haystack.indexOf(needle)!=-1) {
      haystack = haystack.replace(needle, str);
   }
  
 return haystack;
}

function setCookie(name, value, add, expires, path, domain, secure)
{
  var expiration = new Date();
  expiration.setTime(expiration.getTime() + (100*24*60*60*1000));
  
    if (add){
		oldValue = oldValue+","+value;
	} else { 
		oldValue = strreplace(oldValue,","+value,"");
	}
	
	document.cookie= name + "=" + escape(oldValue) +
		((expiration) ? "; expires=" + expiration.toGMTString() : "") +
        ((path) ? "; path=" + path : "") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
}

function getCookie(name)
{
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1)
    {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else
    {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1)
    {
        end = dc.length;
    }
    return unescape(dc.substring(begin + prefix.length, end));
}

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