Creating a Message Popup in Visual Web Developer 2005

I have an IF/Then statement  on an aspx.vb page. I need to popup an informational message when certain conditions are met. In searching the web it seem that javascript is what is needed but I can't find a basic example addressing my specific issue.
In other words would someone hold my hand and show me how to do this?

If Count(0) < 2 Then
Popup a message that says "There isn't enough data to create the chart"
quick503Asked:
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BuginatorConnect With a Mentor Commented:
Sorry, sometimes javascript doesn't like single quotes '.
Here are the fixed version with double quotes:
If Count(0) < 2 Then
   Dim message As String = "There isn't enough data to create the chart."
   ClientScript.RegisterStartupScript(Me.[GetType](), "alert", [String].Concat("<script type='text/javascript'>alert(""", message, """);</script>"))
End If

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BuginatorCommented:
Hello quick503,

I created a code snippet for you, it should work.
Please try it out and let me know.

Regards
If Count(0) < 2 Then
   Dim message As String = "There isn't enough data to create the chart."
   ClientScript.RegisterStartupScript(Me.[GetType](), "alert", [String].Concat("<script>alert('", message, "');</script>"))
End If

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quick503Author Commented:
No Luck. The If/Then statement works but no message pops up.
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quick503Author Commented:
That works great. Thanks
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