function json2url(json){
json.t = Math.random();
var arr = [];
for(var name in json){
arr.push(name+'='+json[name]);
}
return arr.join('&');
}
//url,data,type,time,fnSucc,fnFail
function ajax(json){
var json = json || {};
if(!json.url){
alert('没有地址！');
return;
}
json.data = json.data || {};
json.time = json.time || 1000;
json.type = json.type || 'GET';
//1.ajax对象 request:请求 response:响应
if(window.XMLHttpRequest){
var oAjax = new XMLHttpRequest();
}
else{
var oAjax = new ActiveXObject('Microsoft.XMLHTTP');
}
//2.建立连接
switch (json.type.toLowerCase()){
case 'post':
oAjax.open('POST',json.url,true);
oAjax.setRequestHeader('Content-Type','application/x-www-form-urlencoded');//设置一个请求头
oAjax.send(json2url(json.data));
break;
case 'get':
oAjax.open('GET',json.url+'?'+json2url(json.data),true);
//3.打开连接
oAjax.send();
break;
}
//4.接收
var timer = null;
oAjax.onreadystatechange = function(){
if(oAjax.readyState == 4){
//完成
if(oAjax.status >= 200 && oAjax.status<300 || oAjax.status == 304){
//成功
json.success && json.success(oAjax.responseText);
clearTimeout(timer);
}
else{
json.error && json.error(oAjax.status);
}
}
};
timer = setTimeout(function(){
alert('你的网速太慢了，别等了！！');
},json.time);
}
