I just used vURL and went to your website. On your home page (index) on line 342, you have an injected iframe redirecting to an exploit kit hosted on IP (188.166.65.14).
You can delete the iframe to temporarily stop the damage, but in order to completely remove any potential backdoors, you will want to scan the entire site, check for recent changes, verify permissions, change all passwords related to the site, try to improve your .htaccess page. The two links provided above by Tara and rngdmstr's advice should help move you in the right direction.