16. A computer program product as recited in claim 15 , wherein the television broadcast is displayed with other parts of the markup-language document.
17. A computer program product as recited in claim 16 , wherein one or more markup-language tags included in the markup-language data include a z attribute specifying a z position for the one or more markup-language tags, and wherein at least one of the one or more markup-language tags specifies the z position of the television broadcast with respect to other parts of the markup-language document, the method including: displaying the television broadcast in accordance with the relative z position specified in the z attribute of the at least one of the one or more markup-language tags.