How do you open an Imac?

[d3lt4]

I had never used a mac in my entire life until about 5 days ago when i go hired at a mac computer store. I have to open an imac g3 to replace the battery, but it won't open. It seems stuck in the front under the monitor. Do I need to pry it open or what? Or is there an easier way to change the battery?
Edit: It's an Imac g3 500mhz.

 

[chcarnage]

Page 4 in this PDF

Edit: Instructions may vary because this is the guide to the original 233 Mhz model. In this case try searching the support files on the Apple website.

 

[cgilmore]

I did one once and I had a hell of a time too. There are a lot of little screws hidden all over keep looking.

 

[rcllbrg]

imac?

sledgehammer