все порусски написоно 
 required attribute "alt" not specified
http://translate.google.ru/#en/ru/required%20attribute%20%22alt%22%20not%20specified

and

http://translate.google.ru/#en/ru/You%20may%20have%20neglected%20to%20close%20an%20element%2C%20or%20perhaps%20you%20meant%20to%20%22self-close%22%20an%20element%2C%20that%20is%2C%20ending%20it%20with%20%22%2F%3E%22%20instead%20of%20%22%3E%22.