Execute javascript doesnt work for popup calendar in AJAX

Hi I create a popup calendar and put the following code for clicking on calendar:

Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs)
PopupControlExtender1.Commit(Calendar1.SelectedDate.ToShortDateString())
Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), "setCursor", "alert(777);", True)
End Sub

Page.ClientScript.RegisterClientScriptBlock will cause javascript executed auto when I clicking on popup calendar. It works for ATLAS. But after I moved it to AJAX, it doesn't work. no response for this javascrpt.

Help please.

With ASP.NET AJAX Beta, you need to move to ScriptManager.RegisterClientScriptBlock instead of Page.ClientScript.RegisterClientScriptBlock.

Thanks. David.

But for my case, ScriptManager is put in master page. And the following code is put inside a user control (.ascx) and loaded dynamically.

Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs)
PopupControlExtender1.Commit(Calendar1.SelectedDate.ToShortDateString())
Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), "setCursor", "alert(777);", True)
End Sub

How to get ScriptManager object in user control?

I changed the code as:

Protected Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs)
PopupControlExtender1.Commit(Calendar1.SelectedDate.ToShortDateString())
Dim sm As Microsoft.Web.UI.ScriptManager
sm = Page.Master.FindControl("MasterScriptManager")
sm.RegisterClientScriptBlock(Me.Page, Me.GetType(), "setFocus", "alert(777);", True)
End Sub

it still doesn't work. Help please.

The Control parameter to RegisterClientScriptBlock (the first param) needs to specify a control that's inside the UpdatePanel that's being updated when the script block is to be updated. I suspect that Me.Page in your example does not satisfy that requirement, so please try a control that does.
Thank you so much, David.