我一般用自己的一套ajax，也蛮好用的：
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/** 全局ajax对象 */var ajax = new Object();var ajaxCore = null;/** * @see 创建ajax核心对象,兼容浏览器有：IE6,7,8,9，谷歌，火狐，欧朋，360极速，360安全，苹果，搜狗，遨游，猎豹，腾讯 * @return XMLHttpRequest */ajax.getCore = function() { var xmlHttp = null; if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); if (xmlHttp.overrideMimeType) { xmlHttp.overrideMimeType("text/xml"); } } else { if (window.ActiveXObject) { try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } } if (!xmlHttp) { window.alert("\u8bf7\u4f7f\u7528IE\u6d4f\u89c8\u5668!"); } return xmlHttp;};/** * @see 处理ajax参数 * @param param 参数 * @return String */ajax.getParam = function(param) { var randomStr = "ajaxParamRandom=" + Math.random(); if (param == null || param == "") { return randomStr; } var str = ""; if (typeof(param) == "object") { for (var key in param) { str += key + "=" + param[key] + "&"; } str = (str.length > 0 ? str.substring(0, str.length - 1) : str); } else { str = param; } return str + "&" + randomStr;};/** * @see ajax的回调函数 * @param callback 用户自定义回调函数 * @param url 请求的url */ajax.doCallback = function(callback, url) { if (ajaxCore.readyState == 4) { if (ajaxCore.status == 200) { if (callback == null) { return; } var result = new String(ajaxCore.responseText); if (null != result && result != "") { if (result == "null") { callback(null); } else { var backObject = null; if (result == "true" || result == "false") { backObject = eval(result); } else if (!isNaN(result)) { backObject = parseFloat(result); } else if ((result.substring(0, 1) == "[" && result.substring(result.length - 1, result.length) == "]") || (result.substring(0, 1) == "{" && result.substring(result.length - 1, result.length) == "}")) { backObject = eval("(" + result + ")"); } else { backObject = result; } callback(backObject); } } else { callback(result); } } else if (ajaxCore.status == 0 || ajaxCore.status == 12029) { showProgress("0", "1"); alertWin("\u627e\u4e0d\u5230\u670d\u52a1\u5668\uff01", null, ""); } else if (ajaxCore.status == 404) { showProgress("0", "1"); alertWin("\u627e\u4e0d\u5230\u8d44\u6e90: " + url, null, ""); } }};/** * @see ajax的post请求 * @param url 请求的url * @param param 参数列表，可以是字符串或js对象或null * @param callback 用户自定义回调函数 */ajax.post = function(url, param, callback) { ajaxCore = ajax.getCore(); if (ajaxCore != null) { ajaxCore.onreadystatechange = function() { ajax.doCallback(callback, url); }; ajaxCore.open("POST", url, true); ajaxCore.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); ajaxCore.send(ajax.getParam(param)); }};/** * @see ajax的get请求 * @param url 请求的url * @param callback 用户自定义回调函数 */ajax.get = function(url, callback) { ajaxCore = ajax.getCore(); if (ajaxCore != null) { if (url.indexOf("?") != -1) { url += "&ajaxParamRandom=" + Math.random(); } else { url += "?ajaxParamRandom=" + Math.random(); }alert(url); ajaxCore.onreadystatechange = function() { ajax.doCallback(callback, url); }; ajaxCore.open("GET", url, true); ajaxCore.send(null); }}; |
以上代码写在一个单独的js文件中，其它地方引入，调用方式如下：
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showProgress("1", "1");// ajax进度条: 正在提交，请稍候....ajax.post("/oc/iva.htm", {id:1, version:‘1.2.6‘}, function(json) { showProgress("0", "1");// 关闭进度条 alert(json.success); }); |
我一般用自己的一套ajax，也蛮好用的：
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/** 全局ajax对象 */var ajax = new Object();var ajaxCore = null;/** * @see 创建ajax核心对象,兼容浏览器有：IE6,7,8,9，谷歌，火狐，欧朋，360极速，360安全，苹果，搜狗，遨游，猎豹，腾讯 * @return XMLHttpRequest */ajax.getCore = function() { var xmlHttp = null; if (window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); if (xmlHttp.overrideMimeType) { xmlHttp.overrideMimeType("text/xml"); } } else { if (window.ActiveXObject) { try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } } if (!xmlHttp) { window.alert("\u8bf7\u4f7f\u7528IE\u6d4f\u89c8\u5668!"); } return xmlHttp;};/** * @see 处理ajax参数 * @param param 参数 * @return String */ajax.getParam = function(param) { var randomStr = "ajaxParamRandom=" + Math.random(); if (param == null || param == "") { return randomStr; } var str = ""; if (typeof(param) == "object") { for (var key in param) { str += key + "=" + param[key] + "&"; } str = (str.length > 0 ? str.substring(0, str.length - 1) : str); } else { str = param; } return str + "&" + randomStr;};/** * @see ajax的回调函数 * @param callback 用户自定义回调函数 * @param url 请求的url */ajax.doCallback = function(callback, url) { if (ajaxCore.readyState == 4) { if (ajaxCore.status == 200) { if (callback == null) { return; } var result = new String(ajaxCore.responseText); if (null != result && result != "") { if (result == "null") { callback(null); } else { var backObject = null; if (result == "true" || result == "false") { backObject = eval(result); } else if (!isNaN(result)) { backObject = parseFloat(result); } else if ((result.substring(0, 1) == "[" && result.substring(result.length - 1, result.length) == "]") || (result.substring(0, 1) == "{" && result.substring(result.length - 1, result.length) == "}")) { backObject = eval("(" + result + ")"); } else { backObject = result; } callback(backObject); } } else { callback(result); } } else if (ajaxCore.status == 0 || ajaxCore.status == 12029) { showProgress("0", "1"); alertWin("\u627e\u4e0d\u5230\u670d\u52a1\u5668\uff01", null, ""); } else if (ajaxCore.status == 404) { showProgress("0", "1"); alertWin("\u627e\u4e0d\u5230\u8d44\u6e90: " + url, null, ""); } }};/** * @see ajax的post请求 * @param url 请求的url * @param param 参数列表，可以是字符串或js对象或null * @param callback 用户自定义回调函数 */ajax.post = function(url, param, callback) { ajaxCore = ajax.getCore(); if (ajaxCore != null) { ajaxCore.onreadystatechange = function() { ajax.doCallback(callback, url); }; ajaxCore.open("POST", url, true); ajaxCore.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); ajaxCore.send(ajax.getParam(param)); }};/** * @see ajax的get请求 * @param url 请求的url * @param callback 用户自定义回调函数 */ajax.get = function(url, callback) { ajaxCore = ajax.getCore(); if (ajaxCore != null) { if (url.indexOf("?") != -1) { url += "&ajaxParamRandom=" + Math.random(); } else { url += "?ajaxParamRandom=" + Math.random(); }alert(url); ajaxCore.onreadystatechange = function() { ajax.doCallback(callback, url); }; ajaxCore.open("GET", url, true); ajaxCore.send(null); }}; |
以上代码写在一个单独的js文件中，其它地方引入，调用方式如下：
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showProgress("1", "1");// ajax进度条: 正在提交，请稍候....ajax.post("/oc/iva.htm", {id:1, version:‘1.2.6‘}, function(json) { showProgress("0", "1");// 关闭进度条 alert(json.success); }); |
为什么要有$.get $.post呢，这两种方法用在什么地方呢
原文：http://www.cnblogs.com/aivnfjgj/p/6545501.html