11. The document viewing device according to claim 1 , wherein said input device receives an audio input, and said processing device records, as said viewing history, information specifying the object that corresponds to the input audio and is included in the page displayed on said display device when said audio input is received.
12. The document viewing device according to claim 11 , wherein said document data includes information specifying a prescribed object of said document data, in the process of determining whether the relevant page searched is checked or unchecked, the processing device determines whether the object included in the relevant page searched is checked or unchecked, and extracts the relevant page searched whose object is determined to be unchecked, and in said process of extracting the page for which it is determined that the object is unchecked, said processing device determines based on said viewing history based on said audio input received by said input device whether each said prescribed object is checked or unchecked by said user.