I'm binding a WebDataMenu to an xml file like so:

<ig:WebDataMenu ID="TopNavigationMenu" EnableViewState="true" runat="server" GroupSettings-Orientation="Horizontal" 

GroupSettings-ExpandDirection="Down" GroupSettings-AnimationType="ExpandAnimation"

GroupSettings-AnimationDuration="1" EnableTheming="True" > 

<ClientEvents ItemClick="WebDataMenu1_ItemClick" />

<DataBindings>

<ig:DataMenuItemBinding DefaultText=" " TextField="Text" ValueField="Value"  ImageUrlField="ImageUrl"

                            KeyField="Key" NavigateUrlFields="Url" TargetField="Target" ToolTipField="Text" />

</DataBindings>

</ig:WebDataMenu>

 The client side javascript looks like this:

function WebDataMenu1_ItemClick(sender, e) {            

            return confirm("Proceed with menu click?");

}   

If I take the confirm line of javscript code out then clicking on a menu item goes to the proper url defined in the xml config file. With the confirm line in, it doesn't matter if I choose Ok or Cancel, the page remains the same. This behavior also occurs with alerts. Any help would be appreciated?