Question for project

Question for project

Hi,
I found by chance this site
http://checkwebsite.erigami.com/accessibility.html

and I would like to develop something like that.

Could someone help me ?

I have to ask for an url , then save into database the code and then to check.

But in which format must I save the code. I mean what types of tables in SQL are required .

Any help ??

Thanking you in advance!

P.S. : The loading bar is perfect. Is this Ajax or something else ?