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POJavascript regex returning null but it shouldn't be. Why?
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  1. POJavascript regex returning null but it shouldn't be. Why?
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    copied!<p>I have a regex that searches the source of a page it retrieves via Ajax and gets all the data inbetween and including the fieldset tags.</p> <p>Here's my javascript:</p> <pre><code> var req = new XMLHttpRequest(); var regex = new RegExp("&lt;(fieldset)\b[^&gt;]*&gt;.*?&lt;/\1&gt;"); function showEditForm(i) { req.open('GET', '/admin/maps/edit/' + i, false); req.send(null); var response = req.responseText; //strip out all the line breaks var responseStripped = response.replace( new RegExp("\\n|\\r", "g"), "" ); var regexed = regex.exec(responseStripped) alert(regexed); } </code></pre> <p>Here's the source of responseStripped:</p> <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;&lt;html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"&gt;&lt;head&gt; &lt;meta http-equiv="content-type" content="text/html;charset=UTF-8" /&gt; &lt;title&gt;Gessner Engineering | Administrative Area | edit&lt;/title&gt; &lt;link href="/stylesheets/scaffold.css?1236625014" media="screen" rel="stylesheet" type="text/css" /&gt; &lt;/head&gt;&lt;body&gt; &lt;div id="user-bar-greeting"&gt;Logged in as Thomas Gessner&lt;/div&gt; &lt;div id="user-bar-action" &gt;(&lt;a href="/logout" title="Log out"&gt;Log out&lt;/a&gt;)&lt;/div&gt;&lt;div id="header"&gt;&lt;/div&gt;&lt;ul id="menu"&gt; &lt;li&gt;&lt;a href="/admin"&gt;Home&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="/admin/maps"&gt;Geotechnical Map&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="/admin/profiles"&gt;Profiles&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="/admin/projects"&gt;Projects&lt;/a&gt;&lt;/li&gt; &lt;li&gt;&lt;a href="/admin/users"&gt;Users&lt;/a&gt;&lt;/li&gt;&lt;/div&gt;&lt;div id="content"&gt; &lt;h1&gt;&lt;/h1&gt; &lt;fieldset&gt;&lt;legend&gt;Edit Test Marker&lt;/legend&gt;&lt;form action="/admin/maps/1" class="edit_map" enctype="multipart/form-data" id="edit_map_1" method="post"&gt;&lt;div style="margin:0;padding:0"&gt;&lt;input name="authenticity_token" type="hidden" value="1422cd87ff4d68b2b23c9015a0568bffd47fbfeb" /&gt;&lt;/div&gt; &lt;p&gt; &lt;label for="map_name"&gt;Name&lt;/label&gt;&lt;br /&gt; &lt;input id="map_name" name="map[name]" size="30" type="text" value="Test Marker" /&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_description"&gt;Description&lt;/label&gt;&lt;br /&gt; &lt;textarea cols="40" id="map_description" name="map[description]" rows="5"&gt;test&lt;/textarea&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="category_id"&gt;Category:&lt;/label&gt;&lt;br/&gt; &lt;select id="map_category_id" name="map[category_id]"&gt;&lt;option value=""&gt;Select One&lt;/option&gt;&lt;/select&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_address"&gt;Address&lt;/label&gt;&lt;br /&gt; &lt;input id="map_address" name="map[address]" size="30" type="text" /&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_address2"&gt;Address2&lt;/label&gt;&lt;br /&gt; &lt;input id="map_address2" name="map[address2]" size="30" type="text" /&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_city"&gt;City&lt;/label&gt;&lt;br /&gt; &lt;input id="map_city" name="map[city]" size="30" type="text" /&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_state"&gt;State&lt;/label&gt;&lt;br /&gt; &lt;input id="map_state" name="map[state]" size="2" type="text" /&gt; &lt;/p&gt; &lt;p&gt; &lt;label for="map_zip"&gt;Zip&lt;/label&gt;&lt;br /&gt; &lt;input id="map_zip" name="map[zip]" size="30" type="text" /&gt; &lt;/p&gt; &lt;p&gt; &lt;input id="map_submit" name="commit" type="submit" value="Create" /&gt; &lt;/p&gt;&lt;/form&gt;&lt;/fieldset&gt;&lt;/div&gt;&lt;/body&gt;&lt;/html&gt; </code></pre> <p>I've verified that the regex works in RegexBuddy and at <a href="http://regexpal.com" rel="nofollow noreferrer">RegexPal</a>.</p> <p>However, when all is said and done, I get null returned.</p> <p>What am I doing wrong?</p> <p>Thanks!</p> <p><em>Please note this is in testing form, it may look ugly but I tried to break it down step by step and this is the last state it was in.</em></p>
 

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