Is there an easy way to execute a registered javascript from the menu adapter? 

I usually do this:

In code behind: 

HyperLink1.Attributes("onclick") = "popup_" & PopName & "();focus();" 

Which creates this in the html: 

<a id="HyperLink1" onclick="popup_myFeed();focus();" href="javascript:void(0)">

Or do I need to alter the adapter source code?

 Any creative ideas before I alter the code?
 

The only adapter I have played with so for is the menu adapter, so changes were made there and not in ?WebControlAdapterExtender.vb? as I am not certain of the impact it would have on other adapters.

Made the following changes to MenuAdapter.vb in Sub routine BuildItem:

If (IsLink(item)) Then
    writer.WriteBeginTag("a")
    If (Not String.IsNullOrEmpty(item.NavigateUrl)) Then
       ' Begin script exception code
        If (item.Target.StartsWith("javascript:")) Then
         writer.WriteAttribute("href", Page.Server.HtmlEncode(menu.ResolveClientUrl(item.Target)))
            item.Target = Nothing
            Dim js As String = item.NavigateUrl.ToString
            writer.WriteAttribute("onclick", js)
            writer.WriteAttribute("onkeypress", js)
         Else
            ' End script exception code
            writer.WriteAttribute("href", Page.Server.HtmlEncode(menu.ResolveClientUrl(item.NavigateUrl)))
      End If
Else

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In code behind:

' Set variable script popup name from PopName property in
' class instance and add hyperlink attributes
strPopUp = "popup_" & myPopup.PopName & "();focus();"
HyperLink1.Attributes("onclick") = strPopUp
HyperLink1.Attributes("href") = "javascript:void(0)"

' Set Menu adapter variables for specific menu item
Me.Menu1.Items(0).ChildItems(0).ChildItems(0).Target = "javascript:void(0);"
Me.Menu1.Items(0).ChildItems(0).ChildItems(0).NavigateUrl = strPopUp