To permit immediate determination of the existing location of a hyperlink on a document being displayed, and to permit design of a document without consideration of displaying of the existing location of the hyperlink.
If a control thread 20 is activated, a transparent sheet generation part 21 stores a transparent sheet in a transparent sheet storage part 60, a thread activation part 22 activates a display thread 30 and a visualization thread 40, a location specifying part 23 specifies the existing location of the hyperlink on the document being displayed, and a sign drawing part 24 draws a sign on the location on the transparent sheet. If the display thread 30 is activated, a display part 31 reads the transparent sheet from the transparent sheet storage part 60, and displays it in a visualization state stored in a visualization state storage part 50. If the visualization thread 40 is activated, an instruction acceptance part 41 accepts an instruction from a user, and a visualization part 42 stores the visualization state of the transparent sheet according to the instruction in the visualization state storage part 50.
Yoshihiro City
Takeshi Ueno
Jiro Kobe
Takeshi Senda
Takefusa Kubo