function set_cookie(name, value, exp_y, exp_m, exp_d, path, domain, secure) {
	var cookie_string = name + "=" + escape (value);
	
	if(exp_y) {
		var expires = new Date (exp_y, exp_m, exp_d);
		cookie_string += "; expires=" + expires.toGMTString();
	}
	
	if(path)
		cookie_string += "; path=" + escape (path);
	
	if(domain)
		cookie_string += "; domain=" + escape (domain);
	
	if(secure)
		cookie_string += "; secure";
	
	document.cookie = cookie_string;
}

function get_cookie(cookie_name) {
	var results = document.cookie.match ('(^|;) ?' + cookie_name + '=([^;]*)(;|$)');
	
	if(results)
		return (unescape (results[2]));
	else
		return null;
}


function delete_cookie(cookie_name) {
	var cookie_date = new Date ();  // current date & time
	cookie_date.setTime (cookie_date.getTime() - 1);
	document.cookie = cookie_name += "=; expires=" + cookie_date.toGMTString();
}