text: function Ajax(recvType){
  
  	var aj = new Object();
  
  	aj.recvType = recvType ? recvType.toUpperCase() : 'HTML'; //HTML XML
  
  	aj.targetUrl = '';
  
  	aj.sendString = '';
  
  	aj.resultHandle=null;
  
  	aj.createXMLHttpRequest=function(){
  		var request=false;
  
  		//windows对象中有XMLHttpRequest存在就是非IE，包括IE7，IE8
  		if(window.XMLHttpRequest){
  
  			request = new XMLHttpRequest();
  
  			if(request.overrideMimeType){
  				request.overrideMimeType("text/xml");
  			}	
  
  		//windows对象中有ActiveXobject属性存在就是IE
  		}else if(window.ActiveXObject){
  			//alert('我是IE的低版本');
  			//request=new ActiveXObject("Microsoft.XMLHttp");
  			//request=new ActiveXObject("MSXML.XMLHttp");
  			var versions=['Microsoft.XMLHTTP', 'MSXML.XMLHTTP', 'Msxml2.XMLHTTP.7.0', 'MSXML2.XMLHTTP.6.0', 'MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP'];
  
  			for(var i=0; i<versions.length; i++){
  				try{
  					request = new ActiveXObject(versions[i]);
  					if(request){
  						return request;
  					}
  				}catch(e){
  					request = false;
  				}
  			}
  		}
  
  		return request;
  	}
  
  	aj.XMLHttpRequest = aj.createXMLHttpRequest();
  
  	aj.processHandle = function(){
  		if(aj.XMLHttpRequest.readyState == 4){
  			if(aj.XMLHttpRequest.status == 200){
  				if(aj.recvType == "HTML"){
  					aj.resultHandle(aj.XMLHttpRequest.responseText);
  				}else if(aj.recvType == "XML"){
  					aj.resultHandle(aj.XMLHttpRequest.responseXML);
  				}
  				
  			}
  		}
  	}
  
  	aj.get = function(targetUrl, resultHandle){
  		aj.targetUrl = targetUrl;
  
  		if(resultHandle != null){
  			aj.XMLHttpRequest.onreadystatechange=aj.processHandle;
  			aj.resultHandle = resultHandle;
  		}
  		if(window.XMLHttpRequest){
  			aj.XMLHttpRequest.open("get", aj.targetUrl);
  			aj.XMLHttpRequest.send(null);
  		}else{
  			aj.XMLHttpRequest.open("get", aj.targetUrl, true);
  			aj.XMLHttpRequest.send();
  		}
  		
  	}	
  
  	aj.post = function(targetUrl, sendString, resultHandle){
  		aj.targetUrl = targetUrl;
  
  		if(typeof(sendString) == "object"){
  			var str = "";
  			for(var pro in sendString){
  				str+=pro+"="+sendString[pro]+"&";
  			}
  			aj.sendString = str.substr(0, str.length-1);
  		}else{
  			aj.sendString = sendString;
  		}
  
  		if(resultHandle != null){
  			aj.XMLHttpRequest.onreadystatechange=aj.processHandle;
  			aj.resultHandle = resultHandle;
  		}
  	
  		aj.XMLHttpRequest.open("post", aj.targetUrl);
  		aj.XMLHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  		aj.XMLHttpRequest.send(aj.sendString);
  		
  		
  	}	
  
  	return aj;
  
  }