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");
  }

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);
}