Solved: random non-repeat number generator

Hi,

I am trying to create a random non-repeat number generator. on my webpage currently, I have a label and a button. My thought is when I press the button, it will generate a random number and display this number in the label. I am very new to javascript and have the following code entered into my code. How can I accomplish what I would like to do? I'm not sure what to do with the random number generator javascript code now that it's in the header of my code...:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
    
    <script language="javascript" type="text/javascript">
    
    Random rng = new Random(); // Ideally just create one instance globally
    List<Integer> generated = new ArrayList<Integer>();
    for (int i = 0; i < numbersNeeded; i++)
    {
        while(true)
    {
        Integer next = rng.nextInt(max) + 1;
        if (!generated.contains(next))
        {
            // Done for this iteration
            generated.add(next);
            break;
        }
    }
}
    
    </script>
    
</head>
<body>
    <form id="form1" runat="server">
    <div>
        &nbsp;<asp:Label ID="lblrandnum" runat="server" Height="31px" Width="195px"></asp:Label>
        <asp:Button ID="Button1" runat="server" Text="Button" /></div>
    </form>
</body>
</html>

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If anyone can provide a pseudo code, that will be very helpful!

Thanks!