function rotateEvery(sec)
{
var Advert=new Array()
// QUOTATIONS
Advert[0] = '
SCHOOL PROJECT DUE?
Add PIZZAZZ with video or an interactive animation downloaded from CELLS alive!';
Advert[1] = 'GET INTERACTIVE!
CELLS alive! single-user FLASH animations enhance study and make class projects fun.';
Advert[2] = '
CELLS alive! CDROM.
This site with all animations and a complete video library are on the CELLS alive! CDROM.';
Advert[3] = '
MULTI-USER ANIMATIONS
This symbol indicates downloads that can be used on a classroom network.';
Advert[4] = 'JIGSAW PUZZLES
Spend a few minutes assembling an animal or plant cell jigsaw.';
Advert[5] = '
B-ROLL FOOTAGE
CELLS alive! has a library of unique video images available for production.';
Advert[6] = 'SCIENTIFIC AMERICAN TOP 25
CELLS alive! was named a Top 25 Science and Technology site. OTHER AWARDS.';
Advert[7] = 'KUDOS
"I LOVE your site (and so do my Biology students). Thanks!" - CL, Australia';
Advert[8] = 'CELLS alive! Downloads
"How refreshing to get a problem solved before I report it. Incredible customer service!" - KB, USA';
Advert[9] = 'KUDOS
"Je tiens encore a vous feliciter pour votre site qui comporte des photos magnifiques." - GS, France';
Advert[10] = 'KUDOS
"One of the first true science sites I used in the 90s. Glad you and site are still thriving." - DL, USA';
Advert[11] = 'CELLS alive! CDROM
"Congratulations: watching cells in motion is a quantum leap from inert plates in a biology book." - JC, Germany';
Advert[12] = 'CELLS alive! Downloads.
This icon indicates video clips and animations available as single user downloads.';
Advert[13] = 'FREE CELL GRAPHICS
Download, print, and hand out color Plant and Animal Cell diagrams in your classroom.';
Advert[14] = 'FREE CD-ROM!
Purchase the single user download collection and get a FREE single user CD-ROM.';
Advert[15] = 'FREE CD-ROM!
Purchase the single user download collection and get a FREE single user CD-ROM.';
Advert[16] = 'FREE CD-ROM!
Purchase the single user download collection and get a FREE single user CD-ROM.';
Advert[17] = 'CELLS alive! CDROM.
This site with all animations and a complete video library are on the CELLS alive! CDROM.';
Advert[18] = 'CELLS alive! CDROM.
This site with all animations and a complete video library are on the CELLS alive! CDROM.';
Advert[19] = 'CELLS alive! CDROM.
This site with all animations and a complete video library are on the CELLS alive! CDROM.';
var which = Math.floor(Math.random()*(Advert.length));
document.getElementById('advert').innerHTML = Advert[which];
setTimeout('rotateEvery('+sec+')', sec*15000);
}