一个简单的Ajax类

/**  
	Powered By CMSDream Copyright © 2007-2008 All rights reserved.  
	14:21 2008-5-10  
**/  
function CMSDreamAjaxLib(){   
	/**//**  
	成员变量  
	*/  
	this.XMLHttpReq = null;		//XML对象   
	this.method = "post";		//执行的方法(post/get)   
	this.url = "";			//异步调用的页面地址   
	this.responseText = "";		//异步返回的响应字符串   
	this.responseXML = "";		//异步返回的响应XML   
	this.failed = false;		//创建对象错误标志   
	   
	/**//**  
	事件区  
	*/  
	this.onLoading = function() {};		//正在发送请求   
	this.onLoaded = function() {};		//已经接收到全部响应内容   
	this.onInteractive = function() {};	//正在解析响应内容   
	this.onCompletion = function() {};	//响应内容解析完成   
	this.onError = function() {};		//异步错误处理事件   
	this.onFail = function() {};	//创建对象失败处理世界   
	   
	/**//**  
	重置所有事件函数  
	*/  
	this.resetFunctions = function() {   
		this.onLoading = function() {};   
		this.onLoaded = function() {};   
		this.onInteractive = function() {};   
		this.onCompletion = function() {};   
		this.onError = function() {};   
		this.onFail = function() {};   
	};   
	
	/**//**  
	初始化函数(构造时自动初始化)  
	*/  
	this.init = function(){   
		if(window.XMLHttpRequest){   
			this.XMLHttpReq = new XMLHttpRequest();   
		}else if (window.ActiveXObject){   
			try{this.XMLHttpReq = new ActiveXObject("Msxml4.XMLHTTP");}   
			catch(e){   
				try{this.XMLHttpReq = new ActiveXObject("Msxml3.XMLHTTP");}   
				catch(e){   
					try{this.XMLHttpReq = new ActiveXObject("Msxml2.XMLHTTP");}   
					catch(e){   
						try{this.XMLHttpReq = new ActiveXObject("Microsoft.XMLHTTP");}   
						catch(oc){this.failed=true;}   
					}   
				}   
			}   
		}   
	};   
	   
	/**//**  
	发送请求函数  
	@param data 发送的数据  
	@example send("id=1");  
	*/  
	this.send=function(data){   
		var self=this;   
		if(this.method=="post") {   
			this.XMLHttpReq.open(self.method,self.url,true);   
		}else{   
			this.XMLHttpReq.open(self.method,self.url+"?"+encodeURI(data),true);   
		}   
		//添加消息响应头   
		this.XMLHttpReq.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=utf-8");   
		   
		//异步回调函数   
		this.XMLHttpReq.onreadystatechange = function(){   
			//对象未创建   
			if (self.failed) {   
				self.onFail();   
				return;   
			}   
			   
			//消息响应标志   
			switch (self.XMLHttpReq.readyState) {   
				case 1:{   
					self.onLoading();   
					break;   
				}   
				case 2:{   
					self.onLoaded();   
					break;   
				}   
				case 3:{   
					self.onInteractive();   
					break;   
				}   
				case 4:{   
					self.responseText = self.XMLHttpReq.responseText;   
					self.responseXML = self.XMLHttpReq.responseXML;   
					self.onCompletion();   
					break;   
				}   
			}   
		};   
		   
		   
		if(this.method=="post"){   
			this.XMLHttpReq.send(data); //发送请求   
		}else{   
			this.XMLHttpReq.send();	 //发送请求   
		}   
	};   
	   
	this.abort=function(){   
		this.XMLHttpReq.abort();   
	}   
	   
	this.close=function(){   
		this.XMLHttpReq=null;   
	}   
	this.init();   
}

• ajax
• JavaScript
• 技术人生