| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain long-time pre-confirmation as much as possible in pre-confirmation before purchasing an electronic book. <P>SOLUTION: A display device for displaying the content of a target electronic book before purchasing or reserving the electronic book is so structured that the time capable of pre-confirming is set on the bases of a target book, a page and a customer, and the pages other than the set page(s) are prevented from being displayed; and a display screen is made hard to see unless another page or book is selected after the set time is over. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
