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,{}))----------------