Checking CSS2 and CSS3 web pages using the W3C online facility

I've been using the CSS online checking facility provided by the W3C for many years now. This resource allows you to add a link to your webpages which when followed, reports on the compliance of the page to the recommended W3C standards. If the page doesn't comply then any discrepancies are listed for the user to rework.

To cut a long story short, I found that when I added some new features to a web page which use the CSS Level 3 selectors '::after' and ':not' the pages didn't comply with the Level 2 standards (no surprise there then! - though I didn't expect this at the time, I must admit).
So when I checked the page (as usual) using the W3C auto checking service using the 'default' link settings (i.e. http://jigsaw.w3.org/css-validator/check/referer) then the page showed up these (above mentioned) failures.

To get around this problem I found a link to a page under the CSS validator with an options selector built in. This allowed me to select CSS3 validation for the page in question. By using this new link (see below) the page passed the 'W3C' checks.

For anyone who wants to know, here's is the hyperlink I used to the new validations page
"http://jigsaw.w3.org/css-validator/#validate_by_uri+with_options". I hoep it comes in useful for you too reader!

For the more experienced developer who might be reading this I'd like to ask a favour please. You don't happen to know how to set this up 'options' link automatically do you?

Thanks in Advance,

Rob.