Ajax应用

一. 正规的Ajax

var xmlHttp;
var xmlHttp;
	
function createXMLHttp(){
	if(window.ActiveXObject){
		xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else if(window.XMLHttpRequest){
		xmlHttp = new XMLHttpRequest();
	}
}

function callBack(){
	if (xmlhttp.readyState == 4 && xmlhttp.status == 200){ 
		var text = xmlhttp.responseText; 
		//do...
　} 
}

function callHandler(){
	createXMLHttp();
	xmlhttp.onreadystatechange = callBack;
	var url = "";
	xmlHttp.open("get",url,true);
	xmlHttp.send();
}

二. Prototype.js下的Ajax

function callHandler(){
	var url = '';
	var pars = '';
	
	var myAjax = new Ajax.Request(
	            url,
	            {method: 'get', parameters: pars, onComplete:callBack});
}

function callBack(originalRequest){
	var text=originalRequest.responseText;
}