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//Ajax Function
var reqObj; //Creat Null Instence
var RequestArray = new Array();
//var whichRequest;
//加入请求队列
function AddRequestArray(url,isAsy,method,parStr,callBackFun)
{
var ArgItem = new Array();
ArgItem[0]=url;
ArgItem[1]=isAsy;
ArgItem[2]=method;
ArgItem[3]=parStr;
ArgItem[4]=callBackFun;
RequestArray.push(ArgItem); //将当前请求添加到队列末尾
if(RequestArray.length==1) //如果请求队列里只有当前请求立即要求执行队列，如果有其他请求，那么就不要求执行队列
{
ExeRequestArray();
}
}
//执行队列里的顺序第一个的请求
function ExeRequestArray()
{
if( RequestArray.length>0) //如果队列里有请求执行 AJAX请求
{
var ArgItem = RequestArray[0]; DoRequest(ArgItem[0],ArgItem[1],ArgItem[2],ArgItem[3],ArgItem[4]);
}
}
//Run Ajax (string urladdress,bool IsAsy,string method,string parameters,string whichRequest)
function DoRequest(url,isAsy,method,parStr,callBackFun)
{
reqObj = false;
//whichRequest = whichReq;
if (window.XMLHttpRequest) //compatible Mozilla, Safari,...
{
reqObj = new XMLHttpRequest(); //Creat XMLHttpRequest Instance
if (reqObj.overrideMimeType) //if Mime Type is false ,then set MimeType 'text/xml'
{
reqObj.overrideMimeType('text/xml');
}
}
else if (window.ActiveXObject) //compatible IE
{
try
{
reqObj = new ActiveXObject("Msxml2.XMLHTTP"); //Creat XMLHttpRequest Instance
}
catch (e)
{
try
{
reqObj = new ActiveXObject("Microsoft.XMLHTTP"); //Creat XMLHttpRequest Instance
}
catch (e)
{}
}
}
//if reqObj is false,then alert warnning
if (!reqObj)
{
alert('Giving up :( Cannot create an XMLHTTP instance');
return false;
}
reqObj.onreadystatechange = function(){GetRequest(callBackFun)}; //set onreadystatechange Function
reqObj.open(method, url, isAsy); //set open Function
reqObj.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); //set RequestHeader
reqObj.send(parStr); //do send and send parameters
}
//get Service Response information Function
function GetRequest(callBackFun)
{
//judge readystate information
if (reqObj.readyState == 4)
{
//judge status information
if (reqObj.status == 200)
{
eval(callBackFun+"(reqObj)");
}
else
{
alert('There was a problem with the request.'+reqObj.status+"CallFunction:"+callBackFun); //else alert warnning
}
RequestArray.shift(); //移除队列里的顺序第一个的请求，即当前已经执行完成的请求
ExeRequestArray(); //要求执行队列中的请求
}
}
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