Getting invalid values in code

on my websites I am getting invalid values warnings when i validate them. I am new to css and html and im not sure what to change to fix it, i just recently figured out how to alt= to add image name but im not sure what to do to fix my code further, anyone help, here are my sites

http://www.futuresafeinsurance.com
http://www.custom-built-masonry.com
http://www.flatroofrenewal.com

the only one im really working on is the futuresafe for now until i figure this mess out, please email me at marksbury2@gmail.com

You can't use the same ID of an element more than once. An ID needs to be unique. Also in your anchors where you have name, change it to id.