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<%@ Page Language="C#" %>
<script runat="server">
Random random = new Random();
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Tick(object sender, EventArgs e)
{
ImageTlc.ImageUrl = random.Next() % 2 == 0 ? "http://www.dotnethell.it/img/newlogo3.png" : "http://www.google.it/intl/it_it/images/logo.gif";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<asp:Timer id="TimerTlc" runat="server" OnTick="Tick"
Enabled="True" Interval="1000" />
<asp:UpdatePanel id="UpdateVideo" runat="server">
<ContentTemplate>
<asp:Image ID="ImageTlc" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="TimerTlc" EventName="Tick" />
</Triggers>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>