登录验证javascript代码 小小一测

//登录验证script代码
function validUserNameAndPWD() {
var uName = document.all("txtName");
var uPwd = document.getElementById("txtPwd");
var nameCount = uName.value.indexOf("*");
var pwdCount = uPwd.value.indexOf("=");

if (uName.value == "") {
document.getElementById("lblMsg").innerText = "用户名不能为空";
validMsgColore()
return false;
}
if (nameCount > -1) {
document.getElementById("lblMsg").innerText = "用户名不能包含/"*/"";
validMsgColore()
return false;
}
if (uPwd.value == "") {
document.getElementById("lblMsg").innerText = "密码不能为空";
validMsgColore()
return false;
}
if (pwdCount > -1) {
document.getElementById("lblMsg").innerText = "密码不能包含/"=/"";
validMsgColore()
return false;
}
}
//登录提醒lable的颜色
function validMsgColore() {
document.getElementById("lblMsg").style.color = "red";
}