表单里用户名和密码两个属性,单击按钮触发AJAX函数,这个AJAX函数提取表单中“用户名”和“密码”的值发送到后台程序验证,php写的后台程序,php程序分别对“用户名”和“密码”进行验证,用户名出错给出提示,传回给ajax,显示到f58aca05d63b2dbb1a922cfee2eed17416b28748ea4df4d9c2150843fecfba68中,同理密码出错,显示到d1020d420f6bb7661ce0c270989a582816b28748ea4df4d9c2150843fecfba68中,现在用户名和密码能够正确传到PHP程序中,做出正确验证,但是xmlHttp.responseText,如何能实现上面的效果呀?急!!!
贴出你的代码!
你需要在回调函数中有条件的对不同的目标赋值,那就要回传有控制信息
// JavaScript Documentvar xmlHttp;function S_xmlhttprequest(){ if(window.ActivXObject){ xmlHttp=new ActiveXObject('Mcrosoft.XMLHTTP'); }else if(window.XMLHttpRequest){ xmlHttp=new XMLHttpRequest; } }function php100(){ S_xmlhttprequest(); user=document.myform.user.value; pwd=document.myform.pwd.value; var postStr = 'user='+ user+'&pwd='+pwd; xmlHttp.open('POST','login3.php',true); //定义传输的文件HTTP头信息 xmlHttp.onreadystatechange=byphp; xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded'); //发送POST数据 xmlHttp.send(postStr); }function byphp(){ var byphp100=xmlHttp.responseText; document.getElementById('userInfo').innerHTML=byphp100; }// JavaScript Document// JavaScript Document
form name="myform" method="post" action=""> 用户名:<input type="text" name="user" value="" size=10;/> <br> 密 码:<input type="password" name="pwd" value="" size=10;/> <br> <input type="button" name="button" value="登陆" onclick="php100();"/> </form><div id="userInfo"></div><div id="passInfo"></div>
<?php $username=$_POST['user']; //获取用户编号 $password=$_POST['pwd']; //获取密码编号 if($username=='09430102'){ echo "用户名正确"; }else{ echo "用户名不正确"; } if($password=='my0917'){ echo "密码正确"; }else{ echo "密码错误"; }?>
“用户名”验证返回的信息显示到userinfo那个div中,密码显示到passinfo那个div中;代码应该怎么改?希望详细些,新手谢谢了!
你没有回传啊
var byphp100=xmlHttp.responseText;
document.getElementById('userInfo').innerHTML=byphp100;这不是回传处理了吗?
function byphp(){ var byphp100=xmlHttp.responseText; if(/用户/.test(byphp100)) document.getElementById('userInfo').innerHTML=byphp100; else document.getElementById('passInfo').innerHTML=byphp100;}
index.html
b585974ae3b7dba3039af53a9593f9c4
383eb734b02b508089ba2d78eb4c6f68
93f0f5c25f18dab9d176bd4f6de5d30e
ebeda52af7641f7e715679a8472f8c69
b2386ffb911b14667cb8f0f91ea547a7无标题文档6e916e0f7d1e588d4f442bf645aedb2f
9c3bca370b5104690d9ef395f2c5f8d1
3ac6398dbc2de9aab455ff15ce31b0952cacc6d41bbb37262a98f745aa00fbf0
6c04bd5ca3fcae76e30b72ad730ca86d
2e1cf0710519d5598b1f0f14c36ba674
用户名:fbe8c85d7c4a05bd62010661affbc55a
8c1ecd4bb896b2264e0711597d40766c
e388a4556c0f65e1904146cc1a846bee
密码 7c9cbf64de16e3fddbdf857e5a91157a
94b3e26ee717c64999d7867364b1b4a3
36cc49f0c466276486e50c850b7e4956
73a6ac4ed44ffec12cee46588e518a5e
f58aca05d63b2dbb1a922cfee2eed17416b28748ea4df4d9c2150843fecfba68
ajax.js
var http_request;
function send_request(url,method) {
http_request = false;
if(window.XMLHttpRequest) {
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType('text/xml');
}
}
else if (window.ActiveXObject) {
try {
http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
}
if (!http_request) {
window.alert("不能创建XMLHttpRequest对象实例.");
return false;
}
switch(method){
case 1:http_request.onreadystatechange = chk;break;
}
http_request.open("GET", url, true);
http_request.send(null);
}
function check(){
send_request("check.php?action="+document.getElementById('pw').value,1);
function chk() {
if (http_request.readyState == 4) {
if (http_request.status == 200) {
document.getElementById("user").innerHTML="";
document.getElementById("user").value=http_request.responseText;
} else {
alert("您所请求的页面异常。");
}
}else {
document.getElementById("user").innerHTML="正在读取数据中……";
}
}
check.php
5b40d8b8e40c174d99c3a4c243f146b8
check.php中判断下$_POST['username']和$_POST['pw']
function byphp(){ var byphp100=xmlHttp.responseText; if(/用户/.test(byphp100)) document.getElementById('userInfo').innerHTML=byphp100; else document.getElementById('passInfo').innerHTML=byphp100;}
传json吧
留名! 用jquery不是更好吗