封装好的：ajax.js
function ajax(url, fnSucc,fnFaild){
//1【创建】
if(window.XMLHttpRequest){
var oAjax = new XMLHttpRequest();
}else{
var oAjax = new ActiveXObject("Microsoft.XMLHTTP");
};
//2: 【连接】true:表示异步
oAjax.open('GET',url,true);
//3：【发送】
oAjax.send();
//4：【接受】
oAjax.onreadystatechange = function(){
//判断浏览器操作到哪一步
if(oAjax.readyState == 4){//4：读取完成
if(oAjax.status==200){
fnSucc(oAjax.responseText);
}else{
if(fnFaild){
fnFaild(oAjax.status);
}
}
}
}
}
结构与js代码：
<!DOCTYPE html>
<html>
<!--
作者：702004176@qq.com
时间：2017-04-10
描述：
-->
<head>
<meta charset="UTF-8">
<title>ajax+tab</title>
<meta name="Description" content="ajax获取json数据，并传入页面" />
<meta name="author" content="郭菊锋702004176@qq.com"/>
<script src="ajax.js" type="text/javascript" charset="utf-8"></script>
<style type="text/css">
* {
margin: 0;
} body {
font-family: "微软雅黑";
} li {
list-style: none;
} a {
text-decoration: none;
color: #000;
} a:hover {
text-decoration: underline;
color: #194090;
} .clearfix:after {
content: "";
clear: both;
display: block;
} .tabWrap {
overflow: hidden;
width: 611px;
margin: 100px auto;
} .ulWrap {
padding: 0;
} .ulWrap li {
overflow: hidden;
float: left;
width: 199px;
height: 50px;
line-height: 50px;
margin-right: 3px;
text-align: center;
color: #DFE9F6;
background: #5884CF;
} .ulWrap li.Ahover,
.ulWrap li:hover {
cursor: pointer;
background: #194090;
} .tabWrap div {
overflow: hidden;
width: 591px;
padding: 20px;
padding: 15px 5px;
background: #f1f2f3;
border: 1px solid #5884CF;
border-top: 0;
} .tabWrap div.hide {
display: none;
} .tabWrap div p {
margin-top: 10px;
} .tabWrap div img:hover {
-webkit-box-shadow: 1px 2px 4px 1px #8aa59f;
box-shadow: 1px 2px 4px 1px #8aa59f;
}
</style>
</head> <body>
<div class="tabWrap" id="tabWrap">
<ul class="ulWrap clearfix" id="ulWrap">
</ul>
</div>
<script type="text/javascript">
window.onload = function() {
var ulWrap = document.getElementById("ulWrap"),
tabWrap = document.getElementById("tabWrap"),
txtArea = document.getElementById("txtArea"),
oLi = ulWrap.getElementsByTagName('li'),
oDiv = tabWrap.getElementsByTagName('div');
ajax('tab.json', function(str) {
var str = str;
var oJson = (new Function('return (' + str + ')'))();
var a = oJson['tab'];
//for 1-dom
for (var i = 0; i < a.length; i++) {
var ali = document.createElement("li");
var adiv = document.createElement("div");
ali.innerHTML = a[i]['title'];
adiv.innerHTML = "<a href='#'><img src='" + a[i]['image'] + "'/></a><p><a href='#'>" + a[i]['descript1'] + "</a></p><p><a href='#'>" + a[i]['descript2'] + "</a></p><p><a href='#'>" + a[i]['descript3'] + "</p><p><a href='#'>" + a[i]['descript4'] + "</a></p>";
ulWrap.appendChild(ali);
tabWrap.appendChild(adiv);
var index = i;
if (index == 0) {
ali.className = "Ahover"
} else {
adiv.className = "hide"
}
}
//for 1 end //for 2-tab
for (var i = 0; i < oLi.length; i++) {
oLi[i].index = i;
oLi[i].onclick = function() {
for (var j = 0; j < oLi.length; j++) {
oLi[j].className = "";
oDiv[j].className = "hide";
}
this.className = "Ahover";
oDiv[this.index].className = "";
}
}
//for 2 end
})
}
</script>
</body> </html>
json数据
{
"tab":[
{
"title":"新闻",
"image":"image/img0.jpg",
"descript1":"中国焦虑障碍患病率为4.98% 患病率为何在上升？",
"descript2":"病床上敬礼交警病逝，4岁女儿被确诊急性白血病",
"descript3":"小伙200天穷游50多个城市 剃光头发在寺庙当义工",
"descript4":"过半白领午餐吃快餐和外卖 凭“颜值“判断食物好坏"
},
{
"title":"娱乐",
"image":"image/img1.jpg",
"descript1":"《变形金刚》宇宙要来了！《大黄蜂》定档明年6月",
"descript2":"《傲娇与偏见》主演亮相本周《快乐大本营》",
"descript3":"张杰《歌手》玩融合曲风 再展人声吉他高音",
"descript4":"同样的事张馨予做遭骂 baby却获赞"
},
{
"title":"军事",
"image":"image/img2.jpg",
"descript1":"西方耍赖皮坑中国 今天：我们告定欧盟",
"descript2":"此人到访中国 印总理莫迪暴跳如雷",
"descript3":"美版“知乎“:为什么老外去中国后都不想走?",
"descript4":"不怕中国报复 韩叫嚣外国游客很多"
}
]
}