// GET 方式function ajax() {    // 提取值    var keyword = document.getElementById('keyword').value;    // 实例化    xhr = new XMLHttpRequest();    // 发起请求    xhr.open('get', 'deal.php?keyword='+keyword, true);    xhr.send(null);    // 跟踪    xhr.onreadystatechange = function(){        if (xhr.status == 200 && xhr.readyState == 4) {            document.getElementById('result').innerHTML = xhr.responseText;        }    }}// POST 方式function ajax(str) {    // 实例化    var xhr = new XMLHttpRequest();    // 发起请求    xhr.open('post', 'deal.php', true);    var data = 'keyword='+str;    xhr.setRequestHeader('content-type','application/x-www-form-urlencoded');    xhr.send(data);    // 跟踪    xhr.onreadystatechange = function() {         if (xhr.status == 200 && xhr.readyState == 4) {          document.getElementById('result').innerHTML = xhr.responseText;                    }    }}

 

jQuery方式

$.ajax({    url:'/comm/test1.php',    type:'POST', //GET    async:true,    //或false,是否异步    data:{        name:'yang',age:25    },    timeout:5000,    //超时时间    dataType:'json',    //返回的数据格式：json/xml/html/script/jsonp/text    beforeSend:function(xhr){        console.log(xhr)        console.log('发送前')    },    success:function(data,textStatus,jqXHR){        console.log(data)        console.log(textStatus)        console.log(jqXHR)    },    error:function(xhr,textStatus){        console.log('错误')        console.log(xhr)        console.log(textStatus)    },    complete:function(){        console.log('结束')    }})