ad function in untrim and ununtrim tries to get all the text inside this. The call to ad is malformed and doesn't apply local this to it, hence, it equals to the whole window. Since there are multiple iframe in Gmail's code, jQuery tries to retrieve their contents as well, and fails miserably, while preventing untrim from continuing the execution.
adfunction inuntrimandununtrimtries to get all the text insidethis. The call toadis malformed and doesn't apply localthisto it, hence, it equals to the whole window. Since there are multipleiframein Gmail's code, jQuery tries to retrieve their contents as well, and fails miserably, while preventinguntrimfrom continuing the execution.