[Javascript] Code that used to work in Netscape no longer does

Thu Apr 11 13:05:14 CDT 2002

Hi,

I wrote this script with a group during a CIS course and it has always
worked fine until I loaded it into Netscape Navigator 4.7. It sends back a
NaN value and freezes Netscape. The code still works fine in up to IE 5.50
(haven't tested higher). Can anyone tell me what's wrong?

Thanks,
Audra Seigars

CODE:
<Head>
 <SCRIPT LANGUAGE="JavaScript">
 <!--
     red = parseInt(document.bgColor.substring(1, 3), 16);
     green = parseInt(document.bgColor.substring(3, 5), 16);
     blue = parseInt(document.bgColor.substring(5, 7), 16);

     function hexChar(n) {
  if (n == 10)
     return "A";
  else if (n == 11)
     return "B";
  else if (n == 12)
     return "C";
  else if (n == 13)
     return "D";
  else if (n == 14)
     return "E";
  else if (n == 15)
     return "F";
  else
     return "" + n;
     }
     function toHex(n, d) {
  var s = "";
  for (var i = 0; i < d; i++) {
     s = hexChar(n % 16) + s;
     n = Math.floor(n / 16);
     }
     return s;
     }
     function report() {
  document.colors.redHex.value = toHex(red, 2);
  document.colors.greenHex.value = toHex(green, 2);
  document.colors.blueHex.value = toHex(blue, 2);
     }
     function changeColors() {
  red += 3;
  green += 5;
  blue += 7;

  document.bgColor =
     toHex(red, 2) +
     toHex(green, 2) +
     toHex(blue, 2);
  report();
     }
 //-->
     </SCRIPT>
</HEAD>
<BODY ONLOAD = "report()">
<FORM NAME="colors">
     <CENTER>
     <INPUT TYPE="button" VALUE="Test Color" ONCLICK="changeColors()">
     <FONT COLOR="red">Red</FONT>:
     <INPUT TYPE="text" NAME="redHex" SIZE=3>
     <FONT COLOR="green">Green</FONT>:
     <INPUT TYPE="text" NAME="greenHex" SIZE=3>
     <FONT COLOR="blue">Blue</FONT>:
     <INPUT TYPE="text" NAME="blueHex" SIZE=3>
     </CENTER>
</FORM>
</BODY>