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    <p>The response body is available by <code>xhr.responseText</code>. </p> <p>However, the <a href="http://download.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#sendError%28int,%20java.lang.String%29" rel="noreferrer"><code>HttpServletResponse#sendError()</code></a> ( &lt;-- click the link to read the Javadoc yourself) will use the servletcontainer's default error page template or your custom error page template as you've definied in <code>web.xml</code>. This is a HTML document which you thus have to parse yourself. </p> <p>As per your comment on the other answer, you seem to be using Tomcat and retrieving its default error page; the message is available as first <code>&lt;u&gt;</code> element of the second <code>&lt;p&gt;</code>. So this should do:</p> <pre><code>var errorMessage = $(xhr.responseText).filter('p:eq(1)').find('u').text(); if (errorMessage == 'unavailableimage') { // ... } </code></pre> <p>You only need to keep in mind that you're this way tight coupled to the markup of the (default) error page. Better is to not use <code>HttpServletResponse#sendError()</code>, but just set the status by <a href="http://download.oracle.com/javaee/6/api/javax/servlet/http/HttpServletResponse.html#setStatus%28int%29" rel="noreferrer"><code>HttpServletResponse#setStatus()</code></a> ( &lt;-- yes, click it to read javadoc, the answer was in there) and write the error message to the response body yourself:</p> <pre><code>response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); response.getWriter().write("unavailableimage"); </code></pre> <p>This way the <code>xhr.responseText</code> is exactly <code>unavailableimage</code>.</p> <pre><code>if (xhr.responseText == 'unavailableimage') { // ... } </code></pre>
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    1. COThank you very much BalusC this was exactly what i was looking for. You saved the day :-)
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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