ajax验证用户名二-PHP源码

现在我们把check.js文件代码来看看吧.

function c(){
var uid =document.getElementById('uid').value;
var pwd =document.getElementById('password').value;
var pwd2=document.getElementById('password2').value;
var mo =document.getElementById('mo').value;
var name=document.getElementById('name').value;

if( uid=='' || uid.length>12 || uid.length<3 ){
document.getElementById('u_info').innerHTML='

昵称长度为3-12字符!

';
return false;
}else{
document.getElementById('u_info').innerHTML='

用户名长度3-12位

';
}


if(pwd =='' || pwd!=pwd2 || pwd.length<6 || pwd.length>12){
document.getElementById('p_info').innerHTML='

密码不能为空或二次输入的密码不一致!';
return false;
}else{
document.getElementById('p_info').innerHTML='

';
document.getElementById('p_info1').innerHTML='

';
}

if( mo.match(/^[0-9]{3,4}-[0-9]{7,8}$/) || mo.match(/^(((d{3}))|(d{3}-))?13d{9}$/) ){
document.getElementById('m_info').innerHTML='

';
}else{
document.getElementById('m_info').innerHTML='

手机13875888888与座机（0731-888888）';
return false;
}

if( name=='' || name.length>12 || name.length<2 ){
document.getElementById('n_info').innerHTML='

请输入你的真实姓名!';
return false;
}else{
document.getElementById('n_info').innerHTML='

';
}

}

var xmlHttp = false;

function ajaxcreate(){

try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
}

if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
if(!xmlHttp){alert('Create Xmlhttp Fail ');return false;}
}

function ajax(){
ajaxcreate();
var xmvalue=document.getElementById("uid").value;
var url="ajax_check.php?txt="+encodeURI(xmvalue);
if (xmvalue== null || xmvalue.length>20 || xmvalue == "") return false;
xmlHttp.open("POST",url,true);
xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
xmlHttp.send(xmvalue);
xmlHttp.Onreadystatechange=returnstate;
}
function returnstate(){
if(xmlHttp.readyState != 4 ){
document.getElementById("u_info").innerHTML="

正在验证请稍后...

";
}
if(xmlHttp.readyState == 4 ){
document.getElementById("u_info").innerHTML=xmlHttp.responseText;
}
}