JavaScript自己封装ajax的js
/** * 执行基本ajax请求,返回XMLHttpRequest * Ajax.request({ * url * async 是否异步 true(默认) * method 请求方式 POST or GET(默认) * data 请求参数 (键值对字符串) * success 请求成功后响应函数，参数为xhr * error 请求失败后响应函数，参数为xhr * }); */ Ajax = function() { function request(opt) { function fn() { } var url = opt.url || ""; var async = opt.async !== false, method = opt.method || 'GET', data = opt.data || null, success = opt.success || fn, error = opt.failure || fn; method = method.toUpperCase(); if (method == 'GET' && data) { var args = ""; if(typeof data == 'string'){ //alert("string") args = data; }else if(typeof data == 'object'){ //alert("object") var arr = new Array(); for(var k in data){ var v = data[k]; arr.push(k + "=" + v); } args = arr.join("&"); } url += (url.indexOf('?') == -1 ? '?' : '&') + args; data = null; } var xhr = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP'); xhr.onreadystatechange = function() { _onStateChange(xhr, success, error); }; xhr.open(method, url, async); if (method == 'POST') { xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded;'); } xhr.send(data); return xhr; } function _onStateChange(xhr, success, failure) { if (xhr.readyState == 4) { var s = xhr.status; if (s >= 200 && s < 300) { success(xhr); } else { failure(xhr); } } else { } } return { request : request }; }(); Ajax.request({ url : path + "/report/topn/topn_data.jsp", data : { datatype : datatype }, success : function(xhr) { onData(xhr.responseText); }, error : function(xhr) { } });