Methods and apparatus to identify sponsored media in a document object model

An apparatus to identify sponsored media in a webpage, the apparatus comprising:

• an initiator to:
• initiate a first timer having a first search time period and a second timer having a second search time period in response to an initiation of a search for sponsored media in a first branch of a document object model for a webpage, wherein the first search time period and the second search time period overlap;
• and
• terminate the search upon completion of traversing the first branch when the search reaches a document node that is at a root of the first branch, the first branch including a candidate node;
• and
• an impression logger to:
• in response identifying the candidate node as sponsored media, parse the sponsored media to generate monitoring information;
• and
• modify a user agent setting to include a unique identifier.

A tangible computer readable storage medium comprising instructions that, when executed, cause a machine to at least:

• initiate a first timer having a first search time period and a second timer having a second search time period, in response to an initiation of a search for sponsored media in a first branch of a document object model for a webpage, the first search time period and the second search time period overlap;
• terminate the search upon completion of traversing the first branch when the search reaches a document node that is at a root of the first branch, the first branch including a candidate node;
• in response to identifying the candidate node as sponsored media, parse the sponsored media to generate monitoring information;
• and
• modify a user agent setting to include a unique identifier.