This document is a section of the web browser standards support document. It includes detailed information about HTML support in major web browsers.
HTML is the primary language that makes up a webpage. It puts together all of the text, images, scripts, and other content.
In most web browsers, you can view this page's HTML code by going to the View menu and selecting “Page Source” or “Source”.
The following are the elements and attributes that make up the structure of an HTML document.
The attribute collections at the bottom reflect the browser's best support for those attributes. Support may be weaker in some elements. See the specific element information for details.
| Feature | IE 6 | IE 7 | Firefox 2 | Firefox 3 | Opera 9 |
|---|---|---|---|---|---|
| a | |||||
| (General) | I | I | I | I | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| accesskey | Y | Y | Y | Y | I |
| charset | Y | Y | Y | Y | Y |
| coords | I | I | I | I | Y |
| href | Y | Y | Y | Y | Y |
| hreflang | I | I | Y | Y | I |
| name | I | I | Y | Y | Y |
| onblur | Y | Y | Y | Y | Y |
| onfocus | Y | Y | Y | Y | Y |
| rel | I | I | Y | Y | I |
| rev | I | I | Y | Y | I |
| shape | I | I | I | I | 90% |
| tabindex | I | I | Y | Y | Y |
| target | I | I | I | I | I |
| type | Y | Y | Y | Y | Y |
| abbr | |||||
| (General) | I | Y | Y | Y | Y |
| Core attributes | 50% | 75% | 88% | 88% | 88% |
| Event attributes | 50% | Y | Y | Y | Y |
| I18n attributes | 50% | 75% | Y | Y | 50% |
| acronym | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 50% |
| address | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| area | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| accesskey | Y | Y | Y | Y | Y |
| alt | I | I | Y | Y | Y |
| coords | Y | Y | Y | Y | Y |
| href | Y | Y | Y | Y | Y |
| nohref | Y | Y | Y | Y | Y |
| onblur | Y | Y | Y | Y | Y |
| onfocus | Y | Y | Y | Y | Y |
| shape | 80% | 80% | Y | Y | 90% |
| tabindex | Y | Y | Y | Y | Y |
| target | I | I | I | I | I |
| b | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| base | |||||
| (General) | Y | Y | Y | Y | Y |
| href | Y | Y | Y | Y | Y |
| target | I | I | I | I | I |
| bdo | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| dir | Y | Y | Y | Y | Y |
| lang | 75% | 75% | Y | Y | 75% |
| big | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| blockquote | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| cite | I | I | Y | Y | I |
| body | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| onload | Y | Y | Y | Y | Y |
| onunload | Y | Y | Y | Y | Y |
| br | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| button | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| accesskey | Y | Y | Y | Y | I |
| disabled | Y | Y | Y | Y | Y |
| name | I | I | Y | Y | Y |
| onblur | Y | Y | Y | Y | Y |
| onfocus | Y | Y | Y | Y | Y |
| tabindex | I | I | Y | Y | Y |
| type | 88% | 88% | Y | Y | Y |
| value | I | I | Y | Y | Y |
| caption | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| cite | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| code | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| col | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 63% | 63% | 75% | 75% | 75% |
| Event attributes | 50% | 50% | 50% | 50% | 50% |
| I18n attributes | 75% | 75% | 50% | 50% | 50% |
| Cell alignment attributes | 37% | 37% | 50% | 50% | 68% |
| span | Y | Y | Y | Y | Y |
| width | I | I | Y | Y | I |
| colgroup | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 63% | 63% | 75% | 75% | 75% |
| Event attributes | 50% | 50% | 50% | 50% | 50% |
| I18n attributes | 75% | 75% | 50% | 50% | 50% |
| Cell alignment attributes | 37% | 37% | 50% | 50% | 68% |
| span | Y | Y | Y | Y | Y |
| width | I | I | Y | Y | I |
| dd | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| del | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| cite | I | I | Y | Y | I |
| datetime | I | I | Y | Y | I |
| dfn | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| div | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| dl | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| dt | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| em | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| fieldset | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| form | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| accept | Y | Y | Y | Y | Y |
| accept-charset | I | I | Y | Y | Y |
| action | Y | Y | Y | Y | Y |
| enctype | Y | Y | Y | Y | Y |
| method | Y | Y | Y | Y | Y |
| name | I | I | Y | Y | Y |
| onreset | Y | Y | Y | Y | Y |
| onsubmit | Y | Y | Y | Y | Y |
| target | I | I | I | I | I |
| frame | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 50% | 50% | 50% |
| frameborder | 83% | 83% | 83% | 83% | 83% |
| longdesc | I | I | I | I | I |
| marginheight | Y | Y | Y | Y | Y |
| marginwidth | Y | Y | Y | Y | Y |
| name | I | I | Y | Y | Y |
| noresize | Y | Y | Y | Y | Y |
| scrolling | 88% | 88% | Y | Y | Y |
| src | Y | Y | Y | Y | Y |
| frameset | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 50% |
| cols | Y | Y | Y | Y | Y |
| onload | Y | Y | Y | Y | Y |
| onunload | Y | Y | Y | Y | Y |
| rows | Y | Y | Y | Y | Y |
| h1 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| h2 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| h3 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| h4 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| h5 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| h6 | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| head | |||||
| (General) | I | I | Y | Y | Y |
| I18n attributes | Y | Y | Y | Y | Y |
| profile | I | I | I | I | I |
| hr | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| html | |||||
| (General) | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| i | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 75% | 75% | Y | Y | 75% |
| iframe | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| align | Y | Y | 80% | 80% | 80% |
| frameborder | Y | Y | Y | Y | Y |
| height | Y | Y | Y | Y | Y |
| longdesc | I | I | I | I | I |
| marginheight | Y | Y | Y | Y | Y |
| marginwidth | Y | Y | Y | Y | Y |
| name | I | I | Y | Y | Y |
| scrolling | 88% | 88% | Y | Y | Y |
| src | Y | Y | Y | Y | Y |
| width | Y | Y | Y | Y | Y |
| img | |||||
| (General) | Y | Y | Y | Y | Y |
| Core attributes | 75% | 75% | 88% | 88% | 88% |
| Event attributes | Y | Y | Y | Y | Y |
| I18n attributes | 50% | 50% | Y | Y | 50% |
| alt | Y | Y | Y | Y | Y |
| height | Y | Y | Y | Y | Y |
| ismap | Y | Y | Y | Y | Y |
| longdesc | I | I | Y | Y | I |
| name | I | I | Y | Y | Y |
| src | Y | Y | Y | Y | Y |
| usemap | Y | Y | Y< | ||