Javascript 检查验证码

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='请输入验证码';
    }
    else if(arguments=="false1")
    ...{
        obj.className="Error";
        obj.innerHTML='服务器忙,请稍候...';
    }
    else if(arguments=="false2")
    ...{
        obj.className="Error";
        obj.innerHTML='验证码错误,请重新输入';
    }
    else if(arguments=="true")
    ...{
        obj.className="none";
        obj.innerHTML='';
    }
}