完美兼容IE、FF、Opera的Ajax类支持get、post、自定义回调函数

function Ajax(){  
this.httpXML=false;  
this.init();  
}  
Ajax.prototype.init=function(){  
if(window.XMLHttpRequest){  
this.httpXML=new XMLHttpRequest();   
if (this.httpXML.overrideMimeType){  
this.httpXML.overrideMimeType("text/xml");   
}  
}else if(window.ActiveXObject){  
try{this.httpXML = new ActiveXObject("Msxml2.XMLHTTP");}catch (e){   
try{this.httpXML = new ActiveXObject("Microsoft.XMLHTTP");}catch (e){}   
}  
}  
if(!this.httpXML){  
window.alert("can't create XMLHttpRequest object");  
return null;  
}  
}  
Ajax.prototype.send=function(_method,_url,_data,_callback){  
this.httpXML.onreadystatechange=function(){  
if(this.readyState==4&&this.status==200){  
_callback.call(this,this.responseText);  
}  
}      
if (_method.toLowerCase() == "get"){   
this.httpXML.open(_method, _url, true);   
this.httpXML.send(null);   
}else if (_method.toLowerCase() == "post"){   
this.httpXML.open(_method, _url, true);   
this.httpXML.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");   
this.httpXML.send(_data);   
}      
}
//===========================================
function getResult(data){
alert(data);
}
new Ajax().send('post','url','a=1&b=2',getResult);
posted @ 2011-03-18 14:26  与时俱进  阅读(802)  评论(0编辑  收藏  举报
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