This design has one container div and the columns are seperated by margins between the columns .
Here we avoid the double margin bug of IE6.
Just drag the sliders to adjust the width of the columns, change the color in the palette. Then the tool generates clear CSS codes for the layout.
This tool generates perfect fixed layout in px or em unit. For liquid layout using % unit, we take consideration of rounding issues of browers. Still we get perfect liquid 4 column layout in most cases.
Both fixed column layout and liquid layout work well in the following browers