这里我有一些HTML代码，我需要第一个。加载url源代码，然后键入xpath，结果从基于xPath的URL获取一些文本...如何做...用jquery，ajax ... ???
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
</head>
<body>
<label>Enter URL address here:
<input name="textfield" type="text" value="http://www." />
</label>
<label>
<input type="submit" name="Submit" value="Submit" />
<br />
<br />
Enter xpath location of element:
<input type="text" name="textfield2" />
<input type="submit" name="Submit2" value="Submit" />
<br />
<br />
Selected element is: </label>
<p> </p>
</body>
</html>