I would like to quickly say I have found all of your tutorials very helpful and I use them constantly to reference CSS property use.
However on the padding tutorial page (http://www.w3schools.com/Css/css_padding.asp) I think you forgot to change "margin" to "padding".

The mistake is in the sentence: The margin property can have from one to four values.
I think this should in-fact read: The padding property can have from one to four values.

It's only a little one I know but every little helps

Regards,

Rob Williams.