函数ajaxFunction（）{

    VAR ajaxRequest; //让Ajax成为可能的变量！

尝试{
        //歌剧8.0+，火狐，Safari浏览器
        ajaxRequest =新XMLHtt prequest（）;
    }赶上（五）{
        // Internet Explorer浏览器
        尝试{
            ajaxRequest =新的ActiveXObject（MSXML2.XMLHTTP）;
        }赶上（五）{
            尝试{
                ajaxRequest =新的ActiveXObject（Microsoft.XMLHTTP）;
            }赶上（五）{
                // 出了些问题
                警报（您的浏览器打破了！）;
                返回false;
            }
        }
    }

    ajaxRequest.onreadystatechange =功能（）{
        如果（ajaxRequest.readyState == 4和＆安培; ajaxRequest.status == 200）{
        警报（ajaxRequest.responseText）;
        }
    }


    VAR TXT =的document.getElementById（数据）;
    ajaxRequest.open（POST，hello.php扩展，真正的）;

    ajaxRequest.send（用户=+ txt.value）;
        警报（这里）;
   }
 

我怎么能写完全相同的功能jQuery中的Ajax？

  VAR TXT = $（'＃数据）VAL（）。

$阿贾克斯（{
    网址：hello.php，
    类型：'后'，
    数据：{用户：TXT}，
    成功：功能（数据）{
        警报（数据）;
    }，
    错误：函数（ERR，REQ）{
        警报（您的浏览器打破了！）;
    }
}）;
 

function ajaxFunction(){

    var ajaxRequest;  // The variable that makes Ajax possible!

try{
        // Opera 8.0+, Firefox, Safari
        ajaxRequest = new XMLHttpRequest();
    } catch (e){
        // Internet Explorer Browsers
        try{
            ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try{
                ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e){
                // Something went wrong
                alert("Your browser broke!");
                return false;
            }
        }
    }

    ajaxRequest.onreadystatechange = function(){
        if(ajaxRequest.readyState == 4 && ajaxRequest.status==200){
        alert(ajaxRequest.responseText);
        }
    }


    var txt = document.getElementById("data");
    ajaxRequest.open("POST", "hello.php", true);

    ajaxRequest.send("user=" + txt.value); 
        alert("here");
   }

How can I write the exact same functionality in jQuery Ajax?

var txt = $('#data').val();

$.ajax({
    url: 'hello.php',
    type: 'post',
    data  : { user: txt }, 
    success: function(data) {
        alert(data);
    },
    error : function(err, req) {
        alert("Your browser broke!");
    }
});