Indicates the string classification of the parameter set by the element.

Indicates the string value assigned to a named parameter for the external program.

Provides the MIME type for a param element with a valuetype attribute set to "ref" .

This is the name of the external program's parameter to which a value in the param element applies.

The param object reflects the param element, which passes variable values to ActiveX objects (IE/Windows only), Java applets, and some plugins.