14. The computing system of claim 13 , wherein the computer readable instructions cause the at least one processing unit to: determine that a third web component of the web mashup has same origin scope and is associated with a third domain that is different than the second domain with which the second web component is associated; and prevent the second web component from calling a function implemented by the third web component while allowing a fourth component of the web mashup that is also associated with the third domain to call the function.
13. The computing system of claim 12 , wherein the first web component is associated with a first domain from which the first content of the web mashup is retrieved and the second web component is associated with a second domain from which the second content of the web mashup is retrieved.