ajax 检测用户名是否被占用

//检测用户名是否被占用 
function GetO(){ 
var ajax=false; 
try { 
ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
} catch (e) { 
try { 
ajax = new ActiveXObject("Microsoft.XMLHTTP"); 
} catch (E) { 
ajax = false; 
} 
} 
if (!ajax && typeof XMLHttpRequest!='undefined') { 
ajax = new XMLHttpRequest(); 
} 
return ajax; 
} 
function getResult(serverPage) { 
var ajax = GetO(); 
var sep = (-1 < serverPage.indexOf("?")) ? "&" : "?" 
var newurl = serverPage + sep + "__=" + encodeURIComponent((new Date()).toString()); ajax.open("GET", newurl, true); 
ajax.onreadystatechange = function() { 
if (ajax.readyState == 4 && ajax.status == 200) { 
if(ajax.responseText==1){ 
ShowResult(1,"您的用户名可以正常注册") 
AjaxResult=true; 
}else{ 
ShowResult(0,"您的用户名被占用了") 
AjaxResult=false; 
} 
} 
} 
ajax.send(null); } 
function chkUsername(){ 
var sflag;//标记; 
var sErr;//错误信息; 
sflag=true; var re=/^\w{2,20}$/; 
if(!re.test(document.Form1.UserName.value)){ 
sflag=false; 
sErr="用户名只能输入字母、数字或下划线"; 
} if (document.Form1.UserName.value.length>20||document.Form1.UserName.value.length<2){ 
sflag=false; 
sErr="用户名长度必须在2~20个字符之间"; 
} 
if (document.Form1.UserName.value=="" ){ 
sErr="用户名不能为空"; 
sflag=false; 
} 
//ajax检测返回结果 
if (!sflag) { 
ShowResult(0,sErr) 
}else{ 
getResult("../MemberCheck.aspx?t=1&Name=" + document.Form1.UserName.value); 
} //document.getElementById("spname").innerHTML=ss; 
} 
function ShowResult(tag,str){ 
var obj = document.getElementById("spname"); 
if(tag==0){ 
obj.style.border="1px solid red"; 
obj.style.color="red"; }else{ 
obj.style.border="1px solid green"; 
obj.style.color="green"; 
} 
obj.innerHTML=str; 
obj.style.padding="1px"; 
} 
//取ajax返回的用户问题值 
function getQuestionData(sPage){ 
var ajax = GetO(); 
var sep = (-1 < sPage.indexOf("?")) ? "&" : "?" 
var newurl = sPage + sep + "__=" + encodeURIComponent((new Date()).toString()); ajax.open("GET", newurl, true); 
ajax.onreadystatechange = function() { 
if (ajax.readyState == 4 && ajax.status == 200) { 
if(ajax.responseText==""){ 
document.getElementById("getstate").innerHTML="用户不存在!" 
} 
else{ 
document.g.Question.value=ajax.responseText; 
document.g.Question.readOnly=true; 
document.getElementById("getpwdstep1").style.display="none"; 
document.getElementById("getpwdstep2").style.display="block"; 
document.getElementById("getstate").innerHTML=""; } 
} 
} 
ajax.send(null); 
} 
function getUserQ(){ 
//改变报错span的显示样式 
document.getElementById("getstate").style.padding="1px 4px"; 
if (document.g.UserName.value==""){ 
document.getElementById("getstate").innerHTML="用户名不能为空!" 
}else{ 
document.getElementById("getstate").style.background="red"; 
document.getElementById("getstate").style.color="white"; 
document.getElementById("getstate").innerHTML="正在加载数据..."; 
//设置ajax 
getQuestionData("../MemberCheck.aspx?t=2&gName=" + document.g.UserName.value); 
} 
} function login(n,p,t) 
{ 
if(t==false){ 
document.getElementById("pLogin").style.display="none"; 
document.getElementById("LoginInfo").innerHTML="正在帮您登录，请稍等..."; 
} 
var request; 
if(undefined == request){ 
request = new Request(); 
} if(undefined == request._get){ 
//不支持Ajax获取数据; 
if(t==false){ 
document.getElementById("pLogin").style.display=""; 
document.getElementById("LoginInfo").innerHTML="不能获取数据"; 
} 
} 
else{ 
userName=n; 
toPrev=t; 
request.GetNoCache(loginPath + "LoginCheck.aspx" + "?n=" + n + "&p=" + p,loginCheck); 
} 
} 
function loginCheck(result) 
{ 
if (result.readyState!=ReadyState.Complete) 
return; 
//成功获取; 
if (result.status==HttpStatus.OK && result.responseText != "") 
{ 
//执行返回的语句; 
//alert(result.responseText); 
if (result.responseText=='1') 
{ 
if(toPrev ==false){ 
document.getElementById("LoginInfo").innerHTML='<ul><li>欢迎' + userName + '</li><li><a rel="nofollow noopener noreferrer" href="' + loginPath + 'member/">管理</a></li><li><a rel="nofollow noopener noreferrer" href="' + loginPath + 'Logout.aspx">退出</a></li></ul>'; 
} 
else{ 
if(UrlPrev != ''){ 
document.location.rel="nofollow noopener noreferrer" href=UrlPrev; 
} 
else{ 
document.location.rel="nofollow noopener noreferrer" href=loginPath; 
} 
} 
return; 
} 
else 
{ 
if(document.location.href !="http://" + document.location.hostname + loginPath + "Member/Login.aspx") 
document.location.rel="nofollow noopener noreferrer" href=loginPath + "Member/Login.aspx"; 
} 
} 
else 
{ 
//失败; 
document.location.rel="nofollow noopener noreferrer" href=loginPath + "Member/Login.aspx"; 
return; 
} 
} 
function checkKey(caputureKey,n,p,t){ 
var key = window.event.keyCode; 
if(key == caputureKey){ 
login(n,p,t); 
} 
} 
function setLoginInfo(bLogin){ 
if(bLogin){ 
document.getElementById("LoginInfo").innerHTML='<ul><li>欢迎' + userName + '</li><li><a rel="nofollow noopener noreferrer" href="' + loginPath + 'member/">管理</a></li><li><a rel="nofollow noopener noreferrer" href="' + loginPath + 'Logout.aspx">退出</a></li></ul>'; 
} 
else{ 
} 
} 
function gotoUrl(s){ 
window.location.rel="nofollow noopener noreferrer" href=loginPath + 'Member/RegUser.html'; 
}

到此这篇关于ajax 检测用户名是否被占用就介绍到这了。人生只有走出来的美丽，没有等出来的辉煌。更多相关ajax 检测用户名是否被占用内容请查看相关栏目，小编编辑不易，再次感谢大家的支持！