Javascript 檢查驗證碼

function CheckValidateCode()
...{
   
    var checkcode=document.getElementById("TxtValidateCode").value;
    if(checkcode.length>0)
    ...{
        if(checking==true)
        ...{
            checkValidateCode="false1";
            SetCheckValidateCode(checkValidateCode);
        }
        else
        ...{
            dos("c"+checkcode);
            checking=true;
        }
    }
    else
    ...{      
        checkValidateCode="false";
        SetCheckValidateCode(checkValidateCode);
    }
}

function SetCheckValidateCode(arguments)
...{
    var obj=document.getElementById("checkValidateCode"); 
    if(arguments=="false")
    ...{
        obj.className="Error";
        obj.innerHTML='請輸入驗證碼';
    }
    else if(arguments=="false1")
    ...{
        obj.className="Error";
        obj.innerHTML='伺服器忙,請稍候...';
    }
    else if(arguments=="false2")
    ...{
        obj.className="Error";
        obj.innerHTML='驗證碼錯誤,請重新輸入';
    }
    else if(arguments=="true")
    ...{
        obj.className="none";
        obj.innerHTML='';
    }
}