Thanks for the pointers, DaButcher, but it still doesn't work. I used:
<script language="JavaScript">
<!--
function myFunction1(a1,a2,a3)
{
b1=a1.value;
b2=a2.value;
b3=a3.value;
document.write('FROM myFunction1 PARAMETERS:<br>b1='+b1+'<br>b2='+b2+'<br>b3='+b3+'</p>');
myFunction2(b1,b2,b3);
}...