Javascript debugging

Posted on 2012-03-20
Last Modified: 2012-03-21
I have some simple code that I need to 'debug'.  I dont really know anything about javascript - so I've been trying to use various debuggers, such as JSLint, Microsoft Script Debugger etc.  I'm really struggling to get this done so wondering if someone out there could help me - you can probably identify the errors just by looking at the code... but I'm not that good!
Question by:eyedropp
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Expert Comment

ID: 37744576
Are you looking for a debugger or help debugging your code from EE, I don't see the code

Expert Comment

by:Lalit Chandra
ID: 37744620
Just use firefox and install firebug free firefox plugin. This is the best & simple js debugger i have ever seen. After installing FireBug in firefox, just press F12 and open your page,it will show (in console tab) error inside the firebug.

Author Comment

ID: 37744838
Well either VisionAmp!  I thought I had attached the code.  Not sure what happened there - I'll paste it in here.

I have tried Firebug but it doesnt detect any errors for this code.  But I KNOW there are errors in it.

The code is:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "">

<meta http-equiv="content-type" content="text/html; charset=ISO-8859-1" />
<title>Multiplication Tables</title>
<style type="text/css">
body {font-family: verdana, arial, sans serif; font-size: 1em;}
p {color: #FF0000;}

<div align="center">
<table border="0" width="95%" cellspacing="0" cellpadding="0">
<td width="100%">
<h1>Multiplication Table Using Nested Loops</h1>
<script type="text/javascript" language="javascript">

    var  i, j, total;   // global variables

    for (id = 1; i <= 10; i++) {
       for (j = 1; j < 10; j++)
           total = i * j;
           total = " " + total   //add space before each number
           // Add another space before single digits
           if total < 10 total = " " + total;
          //Display result
                  document.write (total);
        } // end inner j loop
       document.write ("<br />");    // end of line break
     } // end of i outer loop



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Accepted Solution

Lalit Chandra earned 125 total points
ID: 37744909
replace your code inside <script> .. </script> with the following code

  var  i, j, total;   // global variables

  for (id = 1; i <= 10; i++) {
     for (j = 1; j < 10; j++)
      {   total = i * j;
         total = " " + total   //add space before each number
         // Add another space before single digits
         if (total < 10) total = " " + total;
        //Display result
                document.write (total);
      } // end inner j loop
     document.write ("<br />");    // end of line break
   } // end of i outer loop

This will fix your error.
LVL 14

Assisted Solution

Designbyonyx earned 125 total points
ID: 37744988
Something seems fishy about this line:

for (id = 1; i <= 10; i++) {

There is no variable "id" - get rid of the "d"

for (i = 1; i <= 10; i++) {

Author Closing Comment

ID: 37746470
Fantastic - thanks for your help! The code is now doing what it should!

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