Ajax方式实现注册验证代码

function CreateAjax()
{
var XMLHttp;
try
{
XMLHttp = new ActiveXObject("Microsoft.XMLHTTP"); //IE的创建方式
}
catch(e)
{
try
{
XMLHttp = new XMLHttpRequest(); //FF等浏览器的创建方式
}
catch(e)
{
XMLHttp = false; //创建失败，返回false
}
}
return XMLHttp; //返回XMLHttp实例
}//验证用户名是否为空
function GetAdminID(){
var AdminID = document.getElementById('AdminID').value;
if (AdminID==""){
document.getElementById('dl_AdminID').innerHTML='<img src="data:images/icon_cross_sml.gif" width="16" height="16"> 请输入用户名!';
return false;
}else{
document.getElementById('dl_AdminID').innerHTML='';
return true;
}
}//验证密码是否为空
function GetPassWord(){
var PassWord = document.getElementById('PassWord').value;
if (PassWord==""){
document.getElementById('dl_PassWord').innerHTML='<img src="data:images/icon_cross_sml.gif" width="16" height="16"> 请输入密码!';
return false;
}else{
document.getElementById('dl_PassWord').innerHTML='';
return true;
}
}//验证码是否为空
function GetRand(){
var Rand = document.getElementById('Rand').value;
if (Rand==""){
document.getElementById('dl_Rand').innerHTML='<img src="data:images/icon_cross_sml.gif" width="16" height="16"> 请输入验证码!';
return false;
}else{
document.getElementById('dl_Rand').innerHTML='';
return true;
}
}function chklogin(){
if (GetAdminID()==false){
return false;
}
if (GetPassWord()==false){
return false;
}
if (GetRand()==false){
return false;
}
return true;
}