SayWhat?! - The OP does say what laptop he has - "They are all Dells..."
Which leads to the question why is it posted in apple hardware?? Anyway, it can be done non-the-less.
If all you want to do is display the image you have on your computer on your TV, you just need to pick up a scan converter. They are all over the web and range in price, and I would imagine your local best buy or radio shack has one available. The image usually isn't perfect (unless you buy a high dollar system like EXTRON), meaning not as good as the laptop screen, but they do work nicely.
Anyway, here is a link to one:
http://www.radioshack.com/product/index.jsp?productId=2486440
Just google scan converter, or video scaler, or vga to tv.