AJAX 入门笔记

建立请求

var xmlhttp;if (window.XMLHttpRequest)  {// code for IE7+, Firefox, Chrome, Opera, Safari  xmlhttp=new XMLHttpRequest();  }else  {// code for IE6, IE5  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");  }

发送请求

xmlhttp.open("GET","kzzhr",true);xmlhttp.send();aa

输出内容

xmlhttp.onreadystatechange=function(){  if (xmlhttp.readyState==4 && xmlhttp.status==200){    document.getElementById("myDiv").innerHTML=xmlhttp.responseText;  }}

放置数组

var tap=new Array("ID","name","school","grade");x=xmlhttp.responseXML.documentElement.getElementsByTagName("item");for (i=0;i<x.length;i++){var cc= new Array();for (j=1;j<tap.length;j++){var xx = x[i].querySelector(tap[j]).firstChild.nodeValue;cc.push(xx);}mx.push(cc);}