i want to remove the task bar,manu bar from a child window

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I need to remove the task bar,menu bar and close button from the child window...i use this code to done it..but not working

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<span önclick="window.open('CCAgentLiveChat.aspx?ChatId=<%#DataBinder.Eval(Container.DataItem," chatid=") %>&UserName= <%#DataBinder.Eval(Container.DataItem," name=") %>&UserRole= <%#DataBinder.Eval(Container.DataItem," userrole=") %>','mywindow&lt;%#DataBinder.Eval(Container.DataItem,"></span>

[edit]Code block added, HTML encoded - OriginalGriff[/edit]