The JavaScript code you are sending (as seen by using print $response) is:

$('override_...').innerHTML="<a href='#' onClick='javascript:makeForm(
+"...", "...", "...");'>...</a>';
[download]

but it should be

$('override_...').innerHTML="<a href='#' onClick='javascript:makeForm(
+\"...\", \"...\", \"...\");'>...</a>";
[download]

The first double-quote is wrongly closed with a single quote, and you have unescaped double-quotes.

Other potential problems:

• Is $('override_123') valid JavaScript? I've never seen that syntax before, but I have little JavaScript experience.
• Are $componentId, $componentType and $newTitle properly escaped to be used in a JavaScript double-quoted string? (\ => \\, " => \")
• Are $componentId, $componentType and $newTitle properly escaped to be used in an HTML single-quoted value? (& => &, ' => ')
• Is $newTitle properly escaped to be used in HTML? (& => &amp;, < => &lt;)

Update: The following addresses quoting issues:

use strict;
use warnings;

use HTML::Entities qw( encode_entities );

sub js_from_text {
   for (@_ ? $_[0] : $_) {
      s/([\\"])/\\$1/g;
      return qq{"$_"};
   }
}

sub html_from_text {
   for (@_ ? $_[0] : $_) {
      return encode_entities($_);
   }
}

my ($text_componentId, $text_componentType, $text_newTitle) = ...;

my $js_component     = js_from_text("override_$text_componentId");
my $js_componentId   = js_from_text($text_componentId);
my $js_componentType = js_from_text($text_componentType);
my $js_newTitle      = js_from_text($text_newTitle);
my $js_onClick       = "makeForm($js_componentId, $js_componentType, $
+js_newTitle);";
my $html_onClick     = html_from_text($js_onClick);
my $html_newTitle    = html_from_text($text_newTitle);
my $html             = qq{<a href="#" onClick="javascript:$html_onClic
+k">$html_newTitle</a>};
my $js_html          = js_from_text($html);
my $js_response      = "\$($js_component).innerHTML = $js_html;";

print("$js_response\n");
[download]

There is a situation where hungarian notation is very useful. Making Wrong Code Look Wrong is a worthwhile read.

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