| Attributes |
| Name | Required | Request-time | Type | Description |
| id | true | true | java.lang.String | Id of a single generated tab inside of tab dialog. It will be assigned to the block element container generated by this tag that will contain all the other elements. |
| cssclass | false | true | java.lang.String | CSS class for the tab generated by this tag. |
| header | false | true | java.lang.String | User visible text of the header for this tab. |
| active | false | true | java.lang.String | If this tab is the active tab then this attribute should say true or 1. Only one tab of the tab dialog can be made active. |
| img | false | true | java.lang.String | URL of an image to display in tab header. |
| accesskey | false | true | java.lang.String | Access key that will be used for mnemonics to allow user access the content of the tab using keyboard. |
| onfocus | false | true | java.lang.String | JavaScript function that will be called when the tab becomes active. |