ajax.js
function Ajax(recvType){ var aj=new Object(); aj.recvType=recvType ? recvType.toUpperCase() : 'HTML' //HTML XML aj.targetUrl=''; aj.sendString=''; aj.resultHandle=null; aj.createXMLHttpRequest=function(){ var request=false; //window对象中有XMLHttpRequest存在就是非IE,包括(IE7,IE8) if(window.XMLHttpRequest){ request=new XMLHttpRequest(); if(request.overrideMimeType){ request.overrideMimeType("text/xml"); } //window对象中有ActiveXObject属性存在就是IE }else if(window.ActiveXObject){ var versions=['Microsoft.XMLHTTP','MSXML.XMLHTTP','Msxml2.XMLHTTP.7.0','Msxml2.XMLHTTP.6.0','Msxml2.XMLHTTP.5.0','Msxml2.XMLHTTP.4.0','MSXML2.XMLHTTP.3.0','MSXML2.XMLHTTP']; for(var i=0; i<versions.length; i++){ try{ request=new ActiveXObject(versions[i]); if(request){ return request; } }catch(e){ request=false; } } } return request; } aj.XMLHttpRequest=aj.createXMLHttpRequest(); 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); } } } 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(); } } 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; }
使用方法:
<script type="text/javascript"> var ajax = Ajax(); // 实例化对象,默认为 HTTP,如果传入 XML,返回 XML 对象 // Ajax 的 get 方法使用说明 /** * function(targetUrl,resultHandle) * @param string targetUrl 传递过去的 URL 地址 * @param string resultHandle 回调函数,可选项 */ ajax.get('test.PHP?name=liruxing&email=liruxing1715@sina.com',function(data) { eval("var obj="+data); alert(obj.name); alert(obj.email); }); // Ajax 的 post 方法使用说明 /** * function(targetUrl,resultHandle) * @param string targetUrl 传递过去的 URL 地址 * @param string sendString 参数值 * @param string resultHandle 回调函数,可选项 */ ajax.post('test.PHP','name=liruxing&email=liruxing1715@sina.com',function(data){ eval("var obj="+data); alert(obj.name); alert(obj.email); }) // post 第二种格式,第二个参数为 Json 格式 ajax.post('test.PHP',{name:'李茹星',email:'liruxing1715@sina.com'},function(data){ eval("var obj="+data); alert(obj.name); alert(obj.email); }) </script>