problem with javascripts

[senrong]

can anyone please tell me why the below javascripts doesn't work. when the correct 
info is key into the zip code...the page refuse to load the following page.






<!-- saved from url=(0022)http://internet.e-mail -->
<title>survey part 2</title><?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html
 PUBLIC "-//W3C//DTD XHTML Basic 1.0//EN"
 "http://www.w3.org/TR/xhtml-basic/xhtml-basic10.dtd";>
<html xmlns="http://www.w3.org/1999/xhtml"; lang="en-US"><head><title>Untitled 
Document</title>
</head><body><h1>Confirmation <br /> <br /></h1><hr />1)You do own a rifle.<br /><br 
/>2)Is the plate easy to mount on?<br />  Easy<br /><br />3)Is the NVE bulky?<br />  
No<br /><br />4)What type of control do you use?<br />  Digital<br /><br />5)Do you 
own any other NVE?<br />  Yes<hr /></body></html>
<html>

<head>

 <script language="JavaScript">

errorpresent=0
 
function validPostCode (code)
 {
  var len=code.length;
  var digits="0123456789";
  
  if (len!=4)
   {
    alert("Post Code is not the correct length");
    test.code.focus();
    errorpresent=1;   
   }

  var i;
  for (i=0; i<5; i++)
      { 
   if (digits.indexOf(code.charAt(i))<0)
    {
     alert("first four digit must be numeric");
     test.code.focus();
     errorpresent=1;
    }
      }
 if (errorpresent == 0)

  {
  document.location.href="process.cgi"
  }

 }




 </script> 


<title>survey part 2</title>
</head>
<body bgcolor="black" text="green">

<p>Thanks for filling up the first part of the Survey.</p>
<p>We will like to have some general information about you.</p>

<hr>

<p>So please fill in the second portion..Thanks</p>

<form name="test" method="get"> 

  <p>1) Your Age</p>
  
    <input type="radio" name="age" value="1">17~20
    <input type="radio" name="age" value="2" checked>21~25
    <input type="radio" name="age" value="3">26~35
    <input type="radio" name="age" value="3">36<
  
  <p> 2) Your Sex </p>
  
 <p>
    <input type="radio" name="sex" value="Male" checked>Male
    <input type="radio" name="sex" value="Female">Female
  </p>
 
  <p>3) The country you live in</p> 
 
  <p>
     <select name="country">
 <option value="AU" selected>Australia  
        <option value="HK">Hong Kong S.A.R. 
        <option value="JP">Japan 
        <option value="SG">Singapore 
      </select>
  </p>
  
  <p>4)Zipcode</p>
      
 <input type=text name="code" size="5" maxlength="5">

  <p> 
 <input type="submit" name="Submit" value="Submit" 
   onClick="validPostCode(code.value)">
        
 <input type="reset" name="reset" value="Clear all the field">
  </p>
  
</form>
</body>
</html>