function CheckLogin(pre)
{    
    var userObj = document.getElementById(pre + '_txtUser');
    if (userObj.value == "")
    {
        alert("请输入会员登陆名称!");
        userObj.focus();
        return false;
    }
    
    var pwdObj = document.getElementById(pre + '_txtPwd');
    if (pwdObj.value == "")
    {
        alert("请输入会员登陆密码!");
        pwdObj.focus();
        return false;
    }
    
    var codeObj = document.getElementById(pre + '_txtCode');
    if (codeObj.value == "")
    {
        alert("请输入验证码!");
        codeObj.focus();
        return false;
    }
    
    return true;
}

function LoginReset(pre)
{
     var userObj = document.getElementById(pre + '_txtUser');
     var pwdObj = document.getElementById(pre + '_txtPwd');
     var codeObj = document.getElementById(pre + '_txtCode');
     userObj.value = "";
     pwdObj.value = "";
     codeObj.value = ""; 
     userObj.focus(); 
    
     return false;
}

function CheckLogin2(pre)
{
    var txtUser=document.getElementById(pre + '_txtUser');
    var lbMsg=document.getElementById(pre + '_lbMsg');
    var txtPwd=document.getElementById(pre + '_txtPwd');
    if(txtUser.value=="")
    {
        lbMsg.innerText="请输入用户名！";
        txtUser.focus();
        return false;
    }
    if(txtUser.value.length>16)
    {
        lbMsg.innerText="用户名太长，不能超过16个字符！";
        txtUser.value="";
        txtUser.focus();
        return false;
    }
    if(txtPwd.value=="")
    {
        lbMsg.innerText="请输入密码！";
        txtPwd.focus();
        return false;
    }
   
}