function pickThumb(displayNumber)
{

totalPics=22


picNum=Math.ceil(Math.random()*totalPics)


if (picNum==1) picDescr="http://www.proaktiva.ch/rail/polybahn/96020001"
if (picNum==2) picDescr="http://www.proaktiva.ch/rail/polybahn/96020002"
if (picNum==3) picDescr="http://www.proaktiva.ch/rail/polybahn/96062801"
if (picNum==4) picDescr="http://www.proaktiva.ch/rail/polybahn/96062802"
if (picNum==5) picDescr="http://www.proaktiva.ch/rail/polybahn/96062804"
if (picNum==6) picDescr="http://www.proaktiva.ch/rail/polybahn/96062805"
if (picNum==7) picDescr="http://www.proaktiva.ch/rail/polybahn/96062901"
if (picNum==8) picDescr="http://www.proaktiva.ch/rail/polybahn/96062902"
if (picNum==9) picDescr="http://www.proaktiva.ch/rail/polybahn/96062903"
if (picNum==10) picDescr="http://www.proaktiva.ch/rail/polybahn/96070102"
if (picNum==11) picDescr="http://www.proaktiva.ch/rail/polybahn/96070103"
if (picNum==12) picDescr="http://www.proaktiva.ch/rail/polybahn/96070104"
if (picNum==13) picDescr="http://www.proaktiva.ch/rail/polybahn/96070105"
if (picNum==14) picDescr="http://www.proaktiva.ch/rail/polybahn/96070106"
if (picNum==15) picDescr="http://www.proaktiva.ch/rail/polybahn/96070107"
if (picNum==16) picDescr="http://www.proaktiva.ch/rail/polybahn/96070108"
if (picNum==17) picDescr="http://www.proaktiva.ch/rail/polybahn/96070201"
if (picNum==18) picDescr="http://www.proaktiva.ch/rail/polybahn/96070202"
if (picNum==19) picDescr="http://www.proaktiva.ch/rail/polybahn/96070701"
if (picNum==20) picDescr="http://www.proaktiva.ch/rail/polybahn/96070702"
if (picNum==21) picDescr="http://www.proaktiva.ch/rail/polybahn/96070203"
if (picNum==22) picDescr="http://www.proaktiva.ch/rail/polybahn/96100001"

}