I have a Magento website. Someone add adds on my homepage in  header section. 
When I click on my websites menus then other links are opening there.

How can I remove it and how to secure in future for this happening?
You can see my website on top some adds running I wanna remove it. 

Plz help me. My admin panel is not opening.

I have login and password details. When i login with user name and password the it's not open after that in footer a massages is displaying that .

    Fatal error: Access to undeclared static property: Mage::$_isDeveloperMode in /home/rahul1988/public_html/app/Mage.php on line 880

my Website is

http://borsavela.com/