what is your site URL?
was it working previously?
if so have you installed any new plugins, changed theme or upgraded anything since it was last known to be working?
can you log in using other browsers?
And now it does not work in chrome either
So, the login is in but when I click on login button it is not a link and does not work, that’s the issue
You have not answered my questions about plugins and updates, but you can troubleshhot whether this problem is caused by a plugin by deactivating all plugins to see whether this resolves the problem. If so, then you can re-activate the plugins one by one until you find the problematic plugin.
To deactivate plugins when you are unable to login, see
http://codex.wordpress.org/FAQ_Troubleshooting#How_to_deactivate_all_plugins_when_not_able_to_access_the_administrative_menus.3F
