AJAX resume system with js files

Copy codeThe Code is as follows: /*************************************** *******
* @ Author skyz
* @ Function javascript client ajax dealwith
* @ Datetime 2006-3-20
**************************************** ******
* Function: Create a httpRequest object
**************************************** ******/
Function HttpRequest (){
This. _ httpRequest = null; // HttpRequest request object
This. _ callBack = null; // Call back function
This. _ domResult = true; // Result if dom object or text string
This. _ requestData = null; // Request data
This. _ requestResult = null; // HttpRequest result
This. _ stateString = null; // Current request state string
This. _ error = false; // Current if have error
This. _ callBackPara = null; // Current callback function parama
// Internal method for get HttpRequestObject
This. init = function (){
// Judge if Not IE
If (window. XMLHttpRequest ){
This. _ httpRequest = new XMLHttpRequest ();
// Set request mime is text/xml
If (this. _ httpRequest. overrideMimeType ){
This. _ httpRequest. overrideMimeType ('text/xml ');
}
} Else if (window. ActiveXObject ){
Try {
This. _ httpRequest = new ActiveXObject ("Msxml2.XMLHTTP ");
} Catch (ex ){
Try {
This. _ httpRequest = new ActiveXObject ("Microsoft. XMLHTTP ");
} Catch (ex ){
This. _ setMessage (ex, true );
Return;
}
}
// This. _ httpRequest. setrequestheader ("Content-Type", "text/xml; charset = gb2312 ");
}
// Judge HttpRequest object create successful
If (! This. _ httpRequest ){
This. _ setMessage ("XMLHttpRequest object creation failed! Please try again... ", true );
Return;
}
}
/*
* Function: Set the request header
* NamePar: request's header name
* ValuePar: request's header value
*/
This. doSetRequestHeader = function (namePar, valuePar ){
If (this. _ error ){
Return;
}
This. _ httpRequest. setRequestHeader (namePar, valuePar );
}
/*
* Function: Set the request data
* DataPar: request's send data;
*/
This. doSetRequestData = function (dataPar ){
If (this. _ error ){
Return;
}
This. _ requestData = dataPar;
}
/*
* Function get RequestHttp Object
*/
This. _ getRequestObj = function (){
If (this. _ error ){
Return;
}
Return this. _ httpRequest;
}
/*
* Function: Set Callback function para
*/
This. doSetCallBack = function (callBack, paraData ){
This. _ callBack = (callBack )? CallBack: null;
This. _ callBackPara = (paraData )? ParaData: null;
};
/*
* Function: Get current stateString
*/
This. doGetState = function (){
Return this. _ stateString;
}
/*
* Function: get current Error
*/
This. doGetError = function (){
Return this. _ error;
}
/*
*
*/
This. doCallBack = function (){
This. _ callBack (this. _ requestResult, this. _ callBackPara );
}

/*
* Function: Send the request
* UrlPar: request's url path
* [MethodPar]: request's method
* [DomPar]: request's result is dom or string
*/
This. doSendResuest = function (urlPar, methodPar, obj, domPar, asyPar ){
If (obj. _ error ){
Return;
}
MethodPar = (methodPar )? MethodPar: "GET ");
AsyPar = (asyPar )? AsyPar: true );
This. _ domResult = (domPar )? DomPar: obj. _ domResult;
Try {
Var a = this. _ getRequestObj ();
A. onreadystatechange = function (){
If (obj. _ error ){
Return;
}
Var readyStateTmp = a. readyState;
If (readyStateTmp = 0 ){
Obj. _ setMessage ("not initialized! ");
} Else if (readyStateTmp = 1 ){
Obj. _ setMessage ("reading ......");
} Else if (readyStateTmp = 2 ){
Obj. _ setMessage ("Read! ");
} Else if (readyStateTmp = 3 ){
Obj. _ setMessage ("switching one by one ......");
} Else if (readyStateTmp = 4 ){
Var statusTmp = a. status;
If (statusTmp = 404 ){
Obj. _ setMessage ("request page not found! ", True );
} Else if (window. location. href. indexOf ("http") ==-1 | statusTmp = 200 ){
Obj. _ setMessage ("finished! ");
If (this. _ domResult & window. XMLHttpRequest ){
Obj. _ requestResult = a. responseXml;
} Else {
Obj. _ requestResult = a. responseText;
}
If (obj. _ callBack ){
Obj. doCallBack ();
}
} Else {
Obj. _ setMessage ("Unknown error! ");
}
} Else {
Obj. _ setMessage ("Unknown error! ");
}
}
A. open (methodPar, urlPar, asyPar );
// A. setRequestHeader ("If-Modified-Since", "0 ");
A. send (obj. _ requestData );
} Catch (ex ){
Obj. _ setMessage (ex, true );
}
}
/*
* Function: Deal exception error
* ExPar: error string
*/
This. _ setMessage = function (exPar, mark ){
This. _ stateString = exPar. toString ();
This. _ error = (mark )? Mark: false;
}
}

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