Adding Auto Number after two blank Rows

[Maniko]

Hi excelforum ,

I Want to Know that there is any Formula is There for Adding Auto Number after two blank Rows .
For Best Understanding i have given a link of image ..

Image Preview :- http://s2.postimage.org/k509mbfhl/sshot_1.png

As you have noted the numbers are on the url cells after two blank cells ..like that i want the forumal to enter it auto..Thank You in Advance ..