[nyghtGT]

Also:

for (i=0;i<20;i++) {
}

Is basically:

i=0;
while (i<20) {
i++;
}

Why use for ? Cause you can incorporate actions into it ...

for (i=0; i<11; i++; ) {
showimg i,@#v(i),5,100+(i*20);
changeimgvis i,4;
}

So, while, i, is adding to itself it will show text for each
number represented by i ...