HTML Guide
Free site validation
Find out what web pages on your sites are affected by HTML issues.
Attributes in HTML elements must be unique. For example, <a id="one" id="two">
is invalid as the attribute id
is repeated.
Find out what web pages on your sites are affected by HTML issues.
Attributes in HTML elements must be unique. For example, <a id="one" id="two">
is invalid as the attribute id
is repeated.