data The URL for the data that will be presented in the
form Enables the element to be associated with a specific form.
height The height of the element.
name A name for the element.
type The MIME type of the content to be displayed in the object.
usemap The URL of a client-side image map to be applied to the object.
width The width of the element.
In HTML5, you may find yourself using the
Alternative Content for the Tag
What happens when a user hasn’t installed the plug-in that the tag requires?
The browser will either display an error message or just display nothing at all. However,
you can provide alternate content that will be displayed if the browser cannot find the
correct plug-in. All you have to do is include the alternate content inside the
tag. If the tag works, it will be ignored. If it doesn’t, it will be displayed. Here
are the nested tags with some alternative content included. You can see alter-
native content displayed in a browser that does not have Flash installed in Figure 14.11.
Here’s the code: