I am trying to create a web page that displays the local time at various locations around the world. I have reviewed each line of the code in both the .js document as well as the html document and I am at a loss as to what I am doing wrong. Any assistance that can be provided will be greatly appreciated. Thanks.

Here is the HTML file.

HTML Code:
<html>
<head>
<title>World Clock</title>
<link href="je.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="zones.js"></script>
<script type="text/javascript">

   // Creates date object equal to the current date.
   var today = new Date(); 

   //Calculates the offset of current local time from GMT in minutes.
   var offSet = today.getTimezoneOffset()*60*1000;

  // Represents the current time in Greenwich UK.
   var GMT = addTime(today, offSet);

   // Location       City        Offset
   
   // Place1         Houston     (-360)
   // Place2         London      (0)
   // Place3         New York    (-300)
   // Place4         Seattle     (-480)
   // Place5         Sydney Au   (660)
   // Place6         Tokyo       (540)

   // Calculates the time at the various location around the world
   var time1 = addTime(GMT, (-360)*60*1000);//Houston
   var time2 = addTime(GMT, 0);//London
   var time3 = addTime(GMT, (-300)*60*1000);//New York
   var time4 = addTime(GMT, (-480)*60*1000);//Seattle
   var time5 = addTime(GMT, (660)*60*1000);//Sydney Au
   var time6 = addTime(GMT, (540)*60*1000);//Tokyo

   //Displays the current time at each location in the form element "zones"
   document.zones.place1.value =showTime(time1); // Houston
   document.zones.place2.value = showTime(time2); // London
   document.zones.place3.value = showTime(time3); // New York
   document.zones.place4.value = showTime(time4); // Seattle
   document.zones.place5.value = showTime(time5); // Sydney Au
   document.zones.place6.value = showTime(time6); // Tokyo

   </script>

</head>

<body onload= "setInterval('worldClock()', 1000)">
<form id="zones" name="zones" action="">

<div id="headbar">
   <img src="logo.jpg" alt="Jackson Electronics" />
   <h2>Corporate Headquarters World Clock</h2>
</div>

<div id="timemap">

   <input id="place1" name="place1" size="7"  />
   <input id="place2" name="place2" size="7"  />
   <input id="place3" name="place3" size="7"  />
   <input id="place4" name="place4" size="7"  />
   <input id="place5" name="place5" size="7"  />
   <input id="place6" name="place6" size="7"  />

   <img src="map.jpg" alt="World Map" id="map" />
   <table>
   <tr>
   <th id="name1">Houston</th>
   <th id="name2">London</th>
   <th id="name3">New York</th>
   <th id="name4">Seattle</th>
   <th id="name5">Sydney</th>
   <th id="name6">Tokyo</th>
   </tr>
   </table>
   <table>
   <tr>
   <td id="address3">
      <p><b>Jackson Electronics USA</b><br />
         10010 Park Street<br />
         New York NY 10001<br />
         <b>Phone: </b>(212) 555-1209<br />
         <b>Fax: </b>(212) 555-4001
      </p>
   </td>
   <td id="address4">
      <p><b>Jackson Electronics Ltd.</b><br />
         2349 Mitchell Street<br />
         Seattle, WA 65091<br />
         <b>Phone: </b>(381) 555-5499<br />
         <b>Fax: </b>(381) 555-3181
      </p>
   </td>
   <td id="address1">
      <p><b>Jackson Electronics Latin America</b><br />
         5150 Shasta Lane<br />
         Houston, TX 32821<br />
         <b>Phone: </b>(817) 555-8190<br />
         <b>Fax: </b>(817) 555-2881
      </p>
   </td>
   </tr>
   <tr>
   <td id="address2">
      <p><b>Jackson Electronics Europe</b><br />
         18 Northland Avenue<br />
         London, England WC2N 5EA<br />
         <b>Phone: </b>(+44) 0 870 555 7081<br />
         <b>Fax: </b>(+44) 0 870 555 1788
      </p>
   </td>
   <td id="address5">
      <p><b>Jackson Electronics Pacifica</b><br />
         171-105 Thomas Street<br />
         Sydney NSW 2000, Australia<br />
         <b>Phone: </b>(+61) 2 5555 8993<br />
         <b>Fax: </b>(+61) 2 5555 7171
      </p>
   </td>
   <td id="address6">
      <p><b>Jackson Electronics Asia</b><br />
         1-2-99 Sumiyoshi<br />
         Hakata-Ku<br />
         Tokyo 140-8781 Japan<br />
         <b>Phone: </b>(+81) 3 5551 7817<br />
         <b>Fax: </b>(+81) 3 5551 2398
      </p>
   </td>
   </tr>
   </table>
</div>

</form>
</body>
</html>
Here is the JavaScript code:

Code:
    function addTime(oldTime, milliSeconds){

    var newTime = new Date();// creates a new date object (no date specified).
    var newValue = oldTime.getTime() + milliSeconds; // Extracts the number of milliseconds in "oldTime" and add "milliSeconds" to it. Stores the value in a variable named "newValue".
    newTime = newValue.setTime(); // sets the value of newTime to the value of newValue using the setTime() method.
    return newTime; // returns the new value assigned to newTime.
}

// Returns a text string showing the time in 12 hour format.
function showTime(time){
    var hour = time.getHours;
    var minute = time.getMinutes;

// Changes hour from 24-hour format to 12-hour format by:

    // 1) Diplays AM or PM depending on time of day.
    var ampm = (hour < 12) ? "AM" : "PM";

    // 2) Subtracts 12 from the hour variable.
    hour = (hour > 12) ? hour - 12 : hour;

    // 3) Changes hour to 12, if it equals 0.
    hour = (hour == 0) ? 12 : hour;

    // Add leading zero to minutes less than 10.
    minute = minute < 10 ? "0" + minute : minute;

    return hour + ":" + minute + " " + ampm;
}
As far as I can see there are no syntax errors