Google provides a script for plusone button. Unfortunately, it's not validated by W3C Validator, you will get 2 errors:
Element name g:plusone cannot be represented as XML 1.0.
Element g:plusone not allowed as child of element td in this context. (Suppressing further errors from this subtree.)
Final Solution: Check HTML5 valid syntax option on advance settings
Update on Jan 08, 2012: Google has added a new option named "HTML5 valid syntax" to fix this problem:
- Visit plusone button
- Click Advanced options, then check the option HTML5 valid syntax
- Copy the codes into your site.
To use Google +1 button without w3c errors, There are two ways to fix this problem:
Solution 2: Use JavasScript
Just use document.write to output the plusone code, for example:
<script type="text/javascript">
document.write('<g:plusone size="medium" href="https://googleplussearch.chromefans.org" count="true"></g:plusone>');
</script>
Solution 3: copy the html code created by google script and modify to conform to w3c standards
This way was published by 911web.org, click here to get details.
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Thanks :o)
<su:badge layout="3"></su:badge>
Quote:
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Solution: Element name g:plusone cannot be represented as XML 1.0