The HTML param tag defines a parameter to be used by an HTML object tag. These values may be used by the container object at run-time, to define initial values. They must be located right after the object start tag.
The "id" attribute assigns an identifier to the associated element. This identifier must be unique in the document and can be used to refer to that element.
Example:
Code begin
<p id="paragraph1">This is the first paragraph named as paragraph1. To dynamically change its properties use this identifier.</p>Code end
When the value of the attribute "valuetype" is set to "ref", this attribute defines the content type of the resource specified in the "value" attribute.