function set_cookie(name, value, expires, path, domain, secure) {
	var today = new Date();
	today.setTime(today.getTime());
	if (expires) {expires = expires * 1000 * 60 * 60 * 24;}
	var expires_date = new Date (today.getTime() + (expires));
	document.cookie = name + "=" +escape( value) + ((expires) ? ";expires=" + expires_date.toGMTString() : "") + ((path) ? ";path=" + path : "") + ((domain) ? ";domain=" + domain : "" ) + ((secure) ? ";secure" : "");
}
		
function delete_cookie (name, path, domain) {
	if (get_cookie(name)) document.cookie = name + "=" + ((path) ? ";path=" + path : "") + ((domain) ? ";domain=" + domain : "" ) + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function get_cookie(name) {
	var start = document.cookie.indexOf(name + "=");
	var len = start + name.length + 1;
	if ( (!start) && (name != document.cookie.substring(0, name.length) ) ) {return null;}
	if (start == -1) return null;
	var end = document.cookie.indexOf(";", len);
	if (end == -1) end = document.cookie.length;
	return unescape( document.cookie.substring(len, end) );
}