var user = $("username");
var userts = $("usersp");
var pwd = $("password");
var pwdts= $("pwdsp");
var ts = $("tishi");
function $(id){
return document.getElementById(id);
}
var xmlHttp; function getXmlHttp()
{
if(window.ActiveXObject){
xmlHttp = new ActiveXObject("MICROSOFT.XMLHTTP");
}else if(window.XMLHttpRequest){
xmlHttp = new XMLHttpRequest();
}
}
function checkHaveUser(){
getXmlHttp();
var f = false;
xmlHttp.open("GET","../model/yanzhen.php?username="+user.value+"&pwd="+pwd.value,false);
xmlHttp.onreadystatechange = function(){
if(xmlHttp.readyState == 4){
if(xmlHttp.status == 200){
var str = xmlHttp.responseText;
alert(str);
if(str == "no"){
ts.innerHTML = "用户或密码错误，请重新输入";
f = false;
}else{
f = true;
}
}
}
} xmlHttp.send(null);
return f;
}
function show(){
if(user.value == "" || user.value == null ){
userts.innerHTML = "用户不能为空";
user.focus();
return false;
}else if(pwd.value == "" || pwd.value == null){
pwdts.innerHTML = "密码不能为空";
pwd.focus();
return false;
}else{
var f = checkHaveUser();
return f;
}
}