As I mentioned above, I am unable to access my blog's admin login page. Login address(wp-admin) only shows a black page(nothing but only blank white). Also when I type my blog's address in firefox, it doesn't shows up; again same blank page appears. But sometimes blog appears in firefox. In internet explorer, I can see blog every time I typed in the address. But can't access the admin login page in internet explorer as well.
The problem started(i think) when I tried to automatically ad ad-code in my posts. So I made a few changes in funcation.php. Here is the link which I followed to make these changes,
Here is my blog address:
Looking forward to your helpful replies and thanks in advance.