function setcookie(name,value,expiry,path,domain,secure){
var namestring = name + "=" + value;
var expirystring = (expiry == null) ? "" : " ;
expires = "+ expiry.togmtstring();
var pathstring = (path == null) ? "" : " ;path = "+ path;
var domainstring = (path == null) ? "" : " ;domain = "+ domain;
var securestring = (secure) ?";secure" :"";
document.cookie = namestring + expirystring + pathstring + 
domainstring + securestring;
}

function getcookie (name) {
var cookiefound = false;
var start = 0;
var end = 0;
var cookiestring = document.cookie;
var i = 0;

while (i <= cookiestring.length) {
start = i ;
end = start + name.length;
if (cookiestring.substring(start, end) == name){
cookiefound = true;
break; 
}
i++;
}

if (cookiefound){
start = end + 1;
end = cookiestring.indexof(";",start);
if (end < start)
end = cookiestring.length;
return unescape(cookiestring.substring(start, end));
}
return "";
}

function deletecookie(name){
var expires = new date();
expires.settime (expires.gettime() - 1);

setcookie( name , "delete cookie", expires,null,null,false);
}