// set, get & delete cookies

function cookie_set(name, value, expires, path, domain, secure)
{
	// time in milliseconds
	var today = new Date();
	today.setTime(today.getTime());

	/*
	set the date if a delete time is set
	*/
	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=" + secure : "");

}

// this function gets the cookie, if it exists
function cookie_get(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));
}

// this deletes the cookie when called
function cookie_delete(name, path, domain)
{

	if ( cookie_get( name ) )
	{
		document.cookie = name + "=" + (( path ) ? ";path=" + path : "") + (( domain ) ? ";domain=" + domain : "") + ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
	}
}