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The following example shows how to use the RegisterClientScriptBlock method to use the IsclientScriptBlockRegistered method. If the ECMAScript written in the code declaration block is not registered, RegisterClientScriptBlock calls are issued.
[Visual Basic]
SUB Page_Load (Sender As Object, E as Eventargs)
'Form the script what is to be registered at client side.
DIM Scriptstring as string = "