var randomnumber;
var x;
var books;
books = 16;
randomnumber = Math.floor(Math.random() * books);
randomnumber = randomnumber + 1;
switch(randomnumber)
{
case 1:
document.write('
');
break;
case 2:
document.write('
');
break;
case 3:
document.write('
');
break;
case 4:
document.write('
');
break;
case 5:
document.write('
');
break;
case 6:
document.write('
');
break;
case 7:
document.write('
');
break;
case 8:
document.write('
');
break;
case 9:
document.write('
');
break;
case 10:
document.write('
');
break;
case 11:
document.write('');
break;
case 12:
document.write('
');
break;
case 13:
document.write('
');
break;
case 14:
document.write('
');
break;
case 15:
document.write('');
break;
case 16:
document.write('');
break;
}