var howMany = 3
var advt = new Array(howMany+1)
advt[0]="<a href='http://www.bangkokgemsfair.com' target='_blank'><img src='http://www.diamondworld.net/images/banners/480x60/bangkok_gems_fair_2008.gif' border=0 hspace=2></a>"
advt[1]="<a href='http://www.fancycollection.com' target='_blank'><img src='http://www.diamondworld.net/images/banners/480x60/fancycollection.gif' border=0 hspace=2></a>"
advt[2]="<a href='http://www.ciemmejewels.com/' target='_blank'><img src='http://www.diamondworld.net/images/banners/480x60/ciemme_jewels_india.gif' border=0 hspace=2></a>"
advt[3]="<a href='http://www.bvcgroup.com' target='_blank'><img src='http://www.diamondworld.net/images/banners/480x60/bvc_group.gif' border=0 hspace=2></a>"
function rndnumberadvt(){
var randscript = -1
while (randscript < 0 || randscript > howMany || isNaN(randscript)){
randscript = parseInt(Math.random()*(howMany+1))
}
return randscript
}
quoadvt = rndnumberadvt()
quoxadvt = advt[quoadvt]
document.write(quoxadvt)