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";
}