我有一个生成像下一个xmls的PHP

<register>
  <name>peter</name>
  <age>12</age>
</register> 
<register>
  <name>mary</name>
  <age>20</age>
</register>

所以我收到这个xml(这很好)

$.ajax({success: function(xml) {  

   $(xml).find('register').each (function() 
   { 
     alert($(this).find('name').text()) // works fine,shows peter then mary on the next loop of "each"



     // But if i dont know the tag names (name,age) for each register ?     

     // Something like

      $(this).nodes().each .... // 
 alert($(this).tagName);  // i wanna show "name" & "age",how can i get the tag names inside each register in my xml sample tree?

   });    

}});