title: Extract element from html source code with xpath scripting
body: <p>Here I have a some HTML code and I need to 1st. load url source code then type xpath and as a result get a some text from that URL based on xPath... How to do that... with jquery, ajax ... ???</p>
  
  <p><a href="http://jsfiddle.net/cHtWq/" rel="nofollow">http://jsfiddle.net/cHtWq/</a></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"&gt;
  &lt;head&gt;
  &lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /&gt;
  &lt;title&gt;Untitled Document&lt;/title&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
  &lt;label&gt;Enter URL address here: 
  &lt;input name="textfield" type="text" value="http://www." /&gt;
  &lt;/label&gt;
  &lt;label&gt;
  &lt;input type="submit" name="Submit" value="Submit" /&gt;
  &lt;br /&gt;
  &lt;br /&gt;
  Enter xpath location of element:
  &lt;input type="text" name="textfield2" /&gt;
  &lt;input type="submit" name="Submit2" value="Submit" /&gt;
  &lt;br /&gt;
  &lt;br /&gt;
  Selected element is: &lt;/label&gt;
  &lt;p&gt;&amp;nbsp;&lt;/p&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>