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

Revision 2
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=&lt;%#DataBinder.Eval(Container.DataItem," chatid=") %&gt;&UserName= &lt;%#DataBinder.Eval(Container.DataItem," name=") %&gt;&UserRole= &lt;%#DataBinder.Eval(Container.DataItem," userrole=") %&gt;','mywindow&lt;%#DataBinder.Eval(Container.DataItem,"></span>

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