postback show message in web

hey guys i have a website and a asp menu and a postback trigger to the menu when a user click on the menu item.

my problem is that i can not display the messgae box?

i have saved the message in a session during a postback but it not displaying.

please help
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Tom BeckConnect With a Mentor Commented:
This is typically done by using RegisterClientScriptBlock to load a popup on loading of the page returned to the client.

Look here:
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