I have a div layer:

top 100%
mininav float left 80%
mininave float right 20%
header 100%
sidebar float left 20%
content float right 80%
footer 100%

but all around the out side on both firefox and ie there is like a 5 pixal gap I'm not much of a user of css so I have no idea why this not working any idea's?

I will upload the code later as it is on my other pc. Any help much appricated.

remove the margins from the body element

body {
   margin:0;
}

works perfect cheers