简单ajax类, 比较小, 只用ajax功能时, 可以考虑它

忘了哪儿转来的了, 不时的能够用上, 留存一下

<script language="javascript" type="text/javascript">
/***
     var ajax=Ajax();

    /*get使用方式* /
    ajax.get("php_server.php?id=1&name=xxx", function(data){                
                alert(data); //data为从服务器端读取的数据
            });
    /*第一种post使用方式* /
    ajax.post("php_server.php", "name=xxx&age=23", function(data){
                alert(data);
                });
 
    /*第二种post使用方式* /
    ajax.post("php_server.php", {name:"kkkkkxxxx",age:"34"},function(data){
        alert(data);
    });
*/	     
</script>
//----------------------
function Ajax(recvType){

    var aj=new Object();
    aj.recvType=recvType ? recvType.toUpperCase() : 'HTML';  //向形参中传递的文件类型
     aj.targetUrl='';
    aj.sendString='';
    aj.resultHandle=null;

    /*创建XMLHttpRequest对象*/
    aj.createXMLHttpRequest=function(){
        var xmlHttp = false;
        if(window.XMLHttpRequest){ //在非IE中创建XMLHttpRequest对象
            xmlHttp = new XMLHttpRequest();
        }else if(window.ActiveXObject){
            try{
                xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); //按新版IE创建
            }catch(error1){ //创建失败
                try{
                    xmlHttp = new ActiveXobject("Microsoft.XMLHttp"); //按老版IE创建
                }catch(error2){ //创建失败
                    xmlHttp = false;
                }
            }
        }
        return xmlHttp;
    }

    aj.XMLHttpRequest=aj.createXMLHttpRequest();

    /*处理服务器的响应*/
    aj.processHandle=function(){
        if(aj.XMLHttpRequest.readyState == 4){
            if(aj.XMLHttpRequest.status == 200){
                if(aj.recvType=="HTML")
                    aj.resultHandle(aj.XMLHttpRequest.responseText);
                else if(aj.recvType=="XML")
                    aj.resultHandle(aj.XMLHttpRequest.responseXML);
            }
        }
    }

    /*定义使用get方法传递的方法*/
    aj.get=function(targetUrl, resultHandle){
        aj.targetUrl=targetUrl;    
        
        if(resultHandle!=null){
            aj.XMLHttpRequest.onreadystatechange=aj.processHandle;    
            aj.resultHandle=resultHandle;    
        }
        if(window.XMLHttpRequest){
            aj.XMLHttpRequest.open("get", aj.targetUrl);
            aj.XMLHttpRequest.send(null);
        }else{
            aj.XMLHttpRequest.open("get", aj.targetUrl, true);
            aj.XMLHttpRequest.send();
        }
        
    }

    /*定义使用post方法传递的方法*/
    aj.post=function(targetUrl, sendString, resultHandle){
        aj.targetUrl=targetUrl;

        if(typeof(sendString)=="object"){
            var str="";
            for(var pro in sendString){
                str+=pro+"="+sendString[pro]+"&";    
            }
            aj.sendString=str.substr(0, str.length-1);
        }else{
            aj.sendString=sendString;
        }

        if(resultHandle!=null){
            aj.XMLHttpRequest.onreadystatechange=aj.processHandle;    
            aj.resultHandle=resultHandle;    
        }

        aj.XMLHttpRequest.open("post", targetUrl);
        aj.XMLHttpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
        aj.XMLHttpRequest.send(aj.sendString);
        
    }

    return aj;
}

--------压缩代码----
eval(function(p,a,c,k,e,d){e=function(c){return(c<a?'':e(parseInt(c/a)))+((c=c%a)>35?String.fromCharCode(c+29):c.toString(36))};if(!''.replace(/^/,String)){while(c--){d[e(c)]=k[c]||e(c)}k=[function(e){return d[e]}];e=function(){return'\w+'};c=1};while(c--){if(k[c]){p=p.replace(new RegExp('\b'+e(c)+'\b','g'),k[c])}}return p}('7 I(a){i b=h H();b.m=a?a.G():"t";b.6="";b.j="";b.5=8;b.q=7(){i c=r;3(l.2){c=h 2()}9{3(l.z){y{c=h z("J.K")}s(e){y{c=h M("F.L")}s(d){c=r}}}}u c};b.2=b.q();b.k=7(){3(b.2.N==4){3(b.2.E==A){3(b.m=="t"){b.5(b.2.D)}9{3(b.m=="C"){b.5(b.2.B)}}}}};b.p=7(d,c){b.6=d;3(c!=8){b.2.v=b.k;b.5=c}3(l.2){b.2.o("p",b.6);b.2.n(8)}9{b.2.o("p",b.6,S);b.2.n()}};b.w=7(g,d,c){b.6=g;3(W(d)=="Z"){i f="";10(i e V d){f+=e+"="+d[e]+"&"}b.j=f.P(0,f.T-1)}9{b.j=d}3(c!=8){b.2.v=b.k;b.5=c}b.2.o("w",g);b.2.U("11-X","O/x-Q-R-Y");b.2.n(b.j)};u b};',62,64,'||XMLHttpRequest|if||resultHandle|targetUrl|function|null|else||||||||new|var|sendString|processHandle|window|recvType|send|open|get|createXMLHttpRequest|false|catch|HTML|return|onreadystatechange|post||try|ActiveXObject|200|responseXML|XML|responseText|status|Microsoft|toUpperCase|Object|Ajax|Msxml2|XMLHTTP|XMLHttp|ActiveXobject|readyState|application|substr|www|form|true|length|setRequestHeader|in|typeof|Type|urlencoded|object|for|Content'.split('|'),0,{}))


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