<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML> <HEAD> <META http-equiv="Content-Type" content="text/html; charset=Shift_JIS"> <META http-equiv="Content-Style-Type" content="text/css"> <META HTTP-EQUIV="Content-Script-Type" CONTENT="text/javascript"> <TITLE></TITLE> <script type="text/javascript"> function keisan(){ var a = document.form1.kazu1.value; var b = document.form1.kazu2.value; var c = a*b } if(c<100) { document.write("100未満"); } else { document.write("100以上"); }