Disabling Close button (X)

I have opened a window though window.open("somepage.aspx") only , I have to specifically give a close button to close that window but i want to disable windows Close button(x) so that sessions maintained through my close button can work properly.

Any other way out ?
Thanks
 
check the parameter of window.open
there's one that completly remove the Title Bar... no more title bar... no more [X]

:D

Why am I so great ?
 
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