function change()
{
number = Math.floor(Math.random()*20)
if (number==0)
document.write('
')
if (number==1)
document.write('
')
if (number==2)
document.write('
')
if (number==3)
document.write('
')
if (number==4)
document.write('
')
if (number==5)
document.write('
')
if (number==6)
document.write('
')
if (number==7)
document.write('
')
if (number==8)
document.write('
')
if (number==9)
document.write('
')
if (number==10)
document.write('
')
if (number==11)
document.write('
')
if (number==12)
document.write('
')
if (number==13)
document.write('
')
if (number==14)
document.write('
')
if (number==15)
document.write('
')
if (number==16)
document.write('
')
if (number==17)
document.write('
')
if (number==18)
document.write('
')
if (number==19)
document.write('
')
}