Ajax在Chrome/FireFox中不能正常工作

Question

我寫的這個腳本在IE上完美工作！它在第一次執行操作時在Chrome和FireFox上運行，但在其他操作上失敗。

該腳本很簡單。您可以添加或刪除用戶，每次添加或刪除用戶時，都會更新更新列表。

function Add() { 
    http_request = false; 
    cache=Math.random(); 
    var username=document.getElementById('username').value; 
    if (window.XMLHttpRequest) { // Mozilla, Safari,... 
     http_request = new XMLHttpRequest(); 
     if (http_request.overrideMimeType) { 
     http_request.overrideMimeType('text/html'); 
     } 
    } else if (window.ActiveXObject) { // IE 
     try { 
     http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
     } catch (e) { 
     try { 
      http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
     } catch (e) {} 
     } 
    } 
    if (!http_request) { 
     return false; 
    } 
    http_request.onreadystatechange=function(){ if (http_request.readyState==4 && http_request.status==200){ if (http_request.responseText=="OK"){ Update(); } else { document.getElementById('Response').innerHTML=http_request.responseText; } } } 
    http_request.open('POST', 'add.php?username='+username+'&cache='+cache, true); 
    http_request.send(null); 
} 

function Delete(username) { 
    http_request = false; 
    if (window.XMLHttpRequest) { // Mozilla, Safari,... 
     http_request = new XMLHttpRequest(); 
     if (http_request.overrideMimeType) { 
     http_request.overrideMimeType('text/html'); 
     } 
    } else if (window.ActiveXObject) { // IE 
     try { 
     http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
     } catch (e) { 
     try { 
      http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
     } catch (e) {} 
     } 
    } 
    if (!http_request) { 
     return false; 
    } 
    http_request.onreadystatechange=function(){ if (http_request.readyState==4 && http_request.status==200){ Update(); } } 
    http_request.open('POST', 'delete.php?username='+username, true); 
    http_request.send(null); 
} 

function Update() { 
    http_request = false; 
    if (window.XMLHttpRequest) { // Mozilla, Safari,... 
     http_request = new XMLHttpRequest(); 
     if (http_request.overrideMimeType) { 
     http_request.overrideMimeType('text/html'); 
     } 
    } else if (window.ActiveXObject) { // IE 
     try { 
     http_request = new ActiveXObject("Msxml2.XMLHTTP"); 
     } catch (e) { 
     try { 
      http_request = new ActiveXObject("Microsoft.XMLHTTP"); 
     } catch (e) {} 
     } 
    } 
    if (!http_request) { 
     return false; 
    } 
    http_request.onreadystatechange=function(){ if (http_request.readyState==4 && http_request.status==200){ document.getElementById("list").innerHTML=http_request.responseText; } } 
    http_request.open('GET', 'list.php', true); 
    http_request.send(null); 
} 

請幫忙，謝謝您

Answer 1

使用jQuery。你將不得不編寫很多代碼，它可以在所有瀏覽器中工作。