41. The non-transitory computer readable storage medium of claim 20 , wherein a respective advertisement region of the one or more advertisement regions is defined by a script in the composed web page that identifies the publisher of the composed web page.
41. The non-transitory computer readable storage medium of claim 20 , wherein a respective advertisement region of the one or more advertisement regions is defined by a script in the composed web page that identifies the publisher of the composed web page. 42. The non-transitory computer readable storage medium of claim 41 , wherein the script identifies a size of the respective advertisement region.