Image display device and computer-readable storage medium storing a display control program

A computer-readable storage medium storing a display control program that causes a computer to function as:

• a thumbnail image generating section that generates thumbnail images of at least one or more images out of images of respective pages constituting image data;
• a display controller that causes a display unit to display the thumbnail image of any page generated by the thumbnail image generation section and a pop-up image indicating the pages for which the thumbnail images were generated by the thumbnail image generating section;
• and
• a page designation receiving section that receives the page designated by an operator out of the pages indicated by the pop-up image caused to be displayed by the display controller;
• wherein, when page designation from the operator is received by the page designation receiving section, the display controller causes the display unit to display the thumbnail image of the received page instead of the thumbnail image displayed on the display unit at this point of time.