AJAX简历系统附js文件

/**********************************************
 * @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 对象创建失败！请重试......",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("未初始化！");
                    }else if(readystatetmp==1){
                        obj._setmessage("正在读取中......");
                    }else if(readystatetmp==2){
                        obj._setmessage("已经读取过！");
                    }else if(readystatetmp==3){
                        obj._setmessage("正在逐个切换......");
                    }else if(readystatetmp==4){
                        var statustmp=a.status;
                        if(statustmp==404){
                            obj._setmessage("未找到请求页面！",true);
                        }else if(window.location.href.indexof("http")==-1 || statustmp==200){
                            obj._setmessage("完成！");    
                            if(this._domresult && window.xmlhttprequest){
                                obj._requestresult=a.responsexml;
                            }else{
                                obj._requestresult=a.responsetext;
                            }
                            if(obj._callback){
                                obj.docallback();
                            }
                        }else{
                            obj._setmessage("未知错误！");
                        }
                    }else{
                        obj._setmessage("未知错误！");
                    }    
                }
            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;
     }
 }