function SetCookie (name, value) 
{
	var argv = SetCookie.arguments;
	var argc = SetCookie.arguments.length;
	var expires = (argc > 2) ? argv[2] : null;
	var path = (argc > 3) ? argv[3] : null;
	var domain = (argc > 4) ? argv[4] : null;
	var secure = (argc > 5) ? argv[5] : false;
	document.cookie = name + "=" + escape (value) +
						((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
						((path == null) ? "" : ("; path=" + path)) +
						((domain == null) ? "" : ("; domain=" + domain)) +
						((secure == true) ? "; secure" : "");
}
function vis(visa)
{
	var expdate = new Date ();
	expdate.setTime (expdate.getTime() + (24 * 60 * 60 * 1000 * 365));
	var username = visa;
	if(username!='null') 
	{
		SetCookie ("aid", username, expdate);
	}
}