vb.org Archive - Book Example Has Error

I am so frustrated right now, so frustrated I am tempted to throw my computer right out the window. I am reading this book Beginning Ajax with PHP: From Novice to Professional and the example in the book has an error in the code. Can you believe that? I am trying to teach myself how to program with Ajax and the book itself has bugs, ahh! The error I am getting when I attempt to run this code is this:

Error: catch after unconditional catch
Source File: http://localhost/ajax/functions.js
Line: 17
Source Code:
catch (E)

Below is the source code for function.js, so if someone could help me out I would really appreciated it.

Code:

//Create a boolean variable to check for a valid IE instance.

var xmlhttp = false;



//Check if we are using IE.



try 

{ //If the javascript version is greater than 5

xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 

}

catch (e) 

{ //If not, then use the older active x object



                //If we are using IE.

                xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 



}

catch (E) 

{

//Else we must be using a non-IE browser.

xmlhttp = false;



} 



//If we are using a non-IE browser, create a JavaScript instance of the object. if (!xmlhttp && typeof XMLHttpRequest != 'undefined') { xmlhttp = new XMLHttpRequest(); }



//A variable used to distinguish whether to open or close the calendar. var showCalendar = true;



function showHideCalendar() 

{



        //The location we are loading the page into.

        var objID = "calendar";



        //Change the current image of the minus or plus.



        if (showCalendar == true)

        {

                //Show the calendar.

                document.getElementById("opencloseimg").src = "images/mins.gif";

                //The page we are loading.

                var serverPage = "calendar.php";

                //Set the open close tracker variable.

                showCalendar = false;



                var obj = document.getElementById(objID);

                xmlhttp.open("GET", serverPage);

                xmlhttp.onreadystatechange = function() 

                { 

                        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) 

                        {

                                obj.innerHTML = xmlhttp.responseText;

                        }

                }

                xmlhttp.send(null);

        } 

        else 

        {

                //Hide the calendar.

                document.getElementById("opencloseimg").src = "images/plus.gif";

                showCalendar = true;



                document.getElementById(objID).innerHTML = "";

        }



}

X vBulletin 3.8.12 by vBS Debug Information
Page Generation 0.01571 seconds Memory Usage 1,722KB Queries Executed 10 (?)
More Information
Template Usage: (1)ad_footer_end (1)ad_footer_start (1)ad_header_end (1)ad_header_logo (1)ad_navbar_below (1)bbcode_code_printable (1)footer (1)gobutton (1)header (1)headinclude (6)option (1)post_thanks_navbar_search (1)printthread (3)printthreadbit (1)spacer_close (1)spacer_open Phrase Groups Available: global postbit showthread	Included Files: ./printthread.php ./global.php ./includes/init.php ./includes/class_core.php ./includes/config.php ./includes/functions.php ./includes/class_hook.php ./includes/modsystem_functions.php ./includes/class_bbcode_alt.php ./includes/class_bbcode.php ./includes/functions_bigthree.php Hooks Called: init_startup init_startup_session_setup_start init_startup_session_setup_complete cache_permissions fetch_threadinfo_query fetch_threadinfo fetch_foruminfo style_fetch cache_templates global_start parse_templates global_setup_complete printthread_start bbcode_fetch_tags bbcode_create bbcode_parse_start bbcode_parse_complete_precache bbcode_parse_complete printthread_post printthread_complete
Messages: