// JScript 文件
function return_validator()
{
    var vNum;
    vNum = Math.random();
    vNum = Math.round(vNum*10000);
    
    document.getElementById("img_valid").src="../Validator.aspx?num="+vNum;
}  
      
function validCheck()
{
    var strName = document.getElementById("txb_username").value;
    
    var strPassword = document.getElementById("txb_password").value;
    var strValid = document.getElementById("tbx_valid").value;
    if(strName.trim() == "" || strPassword == "" || strValid.trim() == "")
    {
        alert("用户名、密码或验证码都不能为空！");
        return false;
    }
    
    return true;
}