jQuery实现定时读取分析xml文件的方法

<?xml version="1.0"?><data> <page tasks="1" messages="3" notifications="3"/></data>

$(document).ready(function() { function get_info() {  $.ajax({   type: "GET",   url: "page.xml",   dataType: "xml",   cache: false,   complete: function(doc) {    var tasks = $(doc.responseText).find("page").attr("tasks");    var msgs = $(doc.responseText).find("page").attr("messages");    var notes = $(doc.responseText).find("page").attr("notifications");    if (tasks != $('#tasks').text() ||     msgs != $('#messages').text() ||     notes != $('#notifications').text()) {     document.title = "Facebook" + ' NEW NOTIFICATON';    }    $('#tasks').text(tasks);    $('#messages').text(msgs);    $('#notifications').text(notes);   }  }); } setInterval(function() {  get_info(); }, 5000);});