Depends on what connections your HDTV has.
If it has a VGA connector then you can get a mini-DVI to VGA adapter, then a VGA cable.
If it has a DVI connector then you can get a mini-DVI to DVI adapter then a DVI cable
If it has a HDMI connector then you can get a mini-DVI to DVI adapter, a DVI to HDMI adapter and a HDMI cable.