Can I call clientside popup alert programatically with ASP.NET?

I want to display a popup box programatically in an asp.net timer event function.  I can't use the native msgbox function as it won't work on the live webserver so was thinking of calling a javascript function with an alert box.  The javacript function is already in place I just need to call it but I don't know how to do this from the serverside code without triggering an event.  Is there any way I can trigger a button click event or something programatically to call the javascript function?  Basically my timer tick function runs in the background and at the Tick event it should display the popup if certain conditions are met as outlined in the Tick function.

Any help appreciated.  Thanks.

P.S.  Response.Write("<script language='javascript'>alert('hello');</script>") doesn't work for me.
alankinaneAsked:
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prairiedogCommented:
Try this:

ScriptManager.RegisterStartupScript(Me, Me.GetType(), "alertbox", "alert('Timer.');", True)

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alankinaneAuthor Commented:
Thank-you very much, it was as simple as that!
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