Facebook page is not opening

i'm not able to open the facebook page all of a sudden... it was just working fine till yesterday....

the error that i get is

This webpage is not available.

The webpage at https://www.facebook.com/ might be temporarily down or it may have moved permanently to a new web address.

Here are some suggestions:
Reload this web page later.
More information on this error

i have tried to open it on IE as well as chrome. all other web pages load just fine.