Multiple Name/value Pair Cookie?

In my VB.NET code behind, I've created a multiple name/value pair cookie like this:

Dim UserCookie As HttpCookie = New HttpCookie("UserInfo")
UserCookie.Values.Add("UserNumber", Me.UserNumber.Text)
UserCookie.Values.Add("Password", Me.Password.Text)
UserCookie.Values.Add("UserName", Me.UserName.ToString)
Response.Cookies.Add(UserCookie)

Now, what I need to do (somehow) is read that 'UserInfo' cookie in javascript and be able to extract those values at will. Most of what I'm finding out there doesn't quite do what I need to do.I'm trying to do something like this:

var MyValue = ReadCookie("UserInfo", "UserName")

And MyValue would equal whatever the user had typed into the textbox.