Which font-size: px, pt or em?

Please Help

[domoftheuk]

Hello WebmasterWorld.com Friends,

I would like to know which ones best px, pt, or em?

Please when making your decision consider other browsers, screen resolutions and operating systems

Please Help? This getting on my nerves

[domoftheuk]

Thank you all,

I have decided to use em’s on my new site which I’m hoping to launch on Sunday.

domoftheuk (Dominic Naylor)