Having trouble with Ajax.updater?

I am a JavaScript newcomer and currently facing an issue with prototypes.

I am attempting to update sample.jsp using Ajax.updater after it is loaded, but for some reason, it's not working. Here is the source code of sample.jsp:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
        <script src="prototype.js"></script>
        <script>
            function f1(){
                var ajax = new Ajax.updater(
                {success: 'state'},'part.html'
                ,{method:'get'});
            }
            document.observe('dom:loaded', function() {
                f1();
            });

        </script>
    </head>
    <body>
        state:
        <div id="state"></div>
        <br>
    </body>
</html>

Could someone please help me identify what might be incorrect in my code?

Answer №1

Start by using "Ajax.Updater" with a capital U

Additionally, I suggest experimenting with Firefox and the Firebug plugin for easy debugging of your JavaScript code

Answer №2

I decided to give another solution a try, and it seems to be effective

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">

<html>
    <head>
        <title>Dynamic Zip Code Checker </title>
        <link rel="stylesheet" href="style.css" type="text/css" />
        <script src="prototype.js"></script>
        <script type="text/javascript" language="JavaScript">
            function verifyZip() {
                if($F('zip').length == 5) {
                    var url = 'checkzip.jsp';
                    var params = 'zip=' + $F('zip');
                    var ajax = new Ajax.Updater(
                    {success: 'zipResult'},
                    url,
                    {method: 'get', parameters: params, onFailure: displayError});
                }
            }
            function reportError(request) {
                $F('zipResult') ="Invalid";
            }
        </script>
    </head>
    <body>

        <label for="zip">Enter Zip Code:</label>
        <input type="text" name="zip" id="zip" onkeyup="verifyZip();" />
        <div id="zipResult"></div><p/>

    </body>
</html>

checkzip.jsp

<%
        String zip = request.getParameter("zip");
        if (zip.equals("10009")) {
%>
New York City
<%} else {%>
Unknown Location
<% }%>

Can someone highlight the distinctions between these two methods?

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