function tick(num)
{
if (parent.frames.length != 0) {
document.write("<TABLE WIDTH='80%'><TR><TD WIDTH='100%'></TD><TD><INPUT TYPE='checkbox' NAME='a")
document.write(num)
document.write("' onclick='pok(")
document.write(num)
document.write(")' CHECKED></TD></TR></TABLE>")
}
}

function power(which)
{
var o
o=1
if (which>1) {
for (p=1; p<which; p++) {
o*=2 }
}
return o
}